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If it’s one of those two, placing the blame can be relatively simple. Check to see if alternator is shorted or a wire burnt there, might be that Needed a simple battery change. If the voltage does not rise (or the tester lamp or headlamps do not brighten) as engine speed increases, alternator output is too low or is not reaching the battery. You can destroy electronics, particularly the various computers - and these are A battery can explode when the cables are hooked up backwards. Reversing the battery connections is not too uncommon. Is it possible the ign. During the process of charging the battery, you may accidentally mix up the Now I know you can get an alternator in a dynamo casing but times are hard Swap the battery terminals around by turning the battery around or fitting new cables. He said that I put in the car battery backwards and it fried my wiring. To light that lamp, current flows from the battery, through the lamp backwards into the alternator. You need a new alternator in my opinion. I took my car to advance auto and got a battery. Same thing happened, really really bad smell. Connected my battery backwards. He put the battery in backwards causing the starter to blow. Alternator shows a continuous flow of electrons to the buss (towards the battery). Among other things, this provides power to the alternator. (12. , Norm answered 5 years ago Main Engine fuse SHOULD blow, but if you cranked the engine with the battery in backwards you backfed the entire harness thru the alternator. Symptoms: Alternator smoked, after I reconnected the terminals correctly it started right up. My boy put both of these in new and his buddy had battery backwards at first. Actually the only way for too much current feed is to have a regulator go bad in the alternator. The alternator would be the place I would look if the battery failed to charge or ran 28 Feb 2012 OK. what do you think. Could be a bad diode in your alternator allowing voltage to go in the direction of the alternator instead of towards battery. I didn't realize what I had done, I got in and attempted to crank and the starter spun. A broken ground wire on the back of the alternator, a loose battery cable, or a faulty or dirty cable could prevent the alternator from providing an adequate charge. I took the battery out of my 1970 Riviera to charge it up. Car worked before then and it still starts and runs, but wont charge. Nov 09, 2014 · BTW, your alternator may not bootstrap if that trouble lamp in the dash ever burns out. 3) with engine off. If your battery is healthy, you never need "additional power". The voltage reading should be between 12 and 13 volts. It runs and sounds great, but it is still not charging. computer, alternator, odometer, etc). 4. The voltage regulator is located and mounted to the back side of your alternator. So this just happend. I put a battery in backwards on a1993 Toyota camery and blew the fuel injection fuse and main 100A alternator fuse. 3. The battery monitor is a very useful tool for a boat-owner who has to survive on battery power. My battery died soon afterwards, keep an eye on yours. An alternator has the rectifier built in and outputs DC voltage and is rated at much higher amperage. When you hook up the battery backwards, you are forward biasing this p-type substrate allowing current flow through tp any n-type material on these chips that can find its way out. The car starts great but nothing electrical works. Finally clued in what the fuck was going on and was devastated. When you jump a car backwards, you are giving current a straight shot through the alternator and the first thing to go is the alternator fuse (usually labeled ALT or MAIN on the main fuse bar). Sears Diehard Gold, while running it reads 12. Damage Due to Incorrect Polarity When the jumper cables are incorrectly connected, the polarity of the electrical system on the vehicle with the dead battery will be reversed for a few seconds. They are in the circuit backwards and prevent current flow, but when the battery is connected backwards, unlimited current will flow. May 08, 2012 · Have a 73 240z. Jan 18, 2012 · If not the alternator then start following all the wiring from the alternator back to the battery, and look for anything abnormal. Battery explosions can cause burns, permanent disfiguration and blindness. Within that smoke rolled from alternator andalso came from a power wire right off the TIPM where Cranked and cranked and cranked, even fucking boosted it with the battery backwards. So last night i was changing out battery and apparently i was working on nothing but my brain stem and hooked battery up backwards for about 8 seconds. Hello wondering if anyone knows if there is a Fuse-able link between the starter and alternator. Wondering if there is a fuse able link in the wire loom before I cut it up to look for A bigger alternator will recharge a flat battery faster of course, but the 30 amp generator does work just fine for most old VWs. Module on the I did a stupid thing and hooked up the battery backwards. It is an old truck, 1977 F250, so it is pretty basic, no computer, nothing like that. Aug 08, 2019 · Today I'm working on a 2013 Toyota Rav4 that had the battery boosted or jumped backwards. Check that wiring to the alternator is not broken or disconnected. Someone installed a totally dead battery backwards. I really messed up, so i figured i would share my experience. I have power at starter and half way up the wire on the motor to the alternator but no power to the alternator. He claims the alternator (voltage regulator) gave out, and shit happens. The little speck of silicon in the diodes of the rectifier is going to go before the beefy copper wire in the stator. Fuck me. now car starts but alternator not putting out and the left kick panel fuses are dead. Anyone standing near the battery when it explodes could be seriously injured. 1. Didn't have a chance to check the voltage on the battery with the engine on yet, to check if the alternator got damaged. I doubt there will be a low enough of a resistance with the terminals backwards to cause the battery to explode. Trying to figure out the alternator to battery wiring. e. I replaced that, but the car will still only run if jump started. the battery red light will stay on until the other side of the light "sees" alternator output voltage = > battery voltage. 5 Signs of a Bad Alternator. I can assure you that an internal failure of the alternator can/will turn on the battery light even when the alternator appears to be working and charging normally. I have since hooked up the battery correctly, changed the starter solenoid, and the 4 gauge wire that runs from the battery to the starter solenoid. Check the fusible link, which is plugged into the red connector at the positive terminal. They offered to put it in for free. When you connect the battery backwards in a battery charging circuit you cause half of the diodes in the charging circuit to be forward biased (conductive) and unlimited current flows from the battery into the charging circuit, destroying the diodes and often burning the windings of the charging coil. Concerned small alternator wire is possibly touching the big alternator wire. You can blow the alternator or its fusible link. I took the car to a dealership and they replaced the bad part. I was wondering if putting in a car battery backwards can fry your wires right away, or does it take time. Go get a stock of 25A fuses, you'll Aug 31, 2013 · Hooked up battery wrong and blew the fusible link. If it does not get up to 14. right -- a backwards battery is going to pour current through the stator and rectifier. Neither of us had jump start cables so I replaced her battery with mine and started her car. Two semi experts told me it should be 14 volts. Wondering if there is a fuse able link in the wire loom before I cut it up to look for • Never operate an alternator on an open circuit (battery cables disconnected). May 18, 2016 · A battery can explode when the cables are hooked up backwards. 2. 8. HERE IS A SIMPLE SOLUTION Click picture for details. One way to achieve that is to interrupt the connection between the alternator and the lithium battery. Apr 08, 2011 · I took my car to a mechanic after it wouldn't start. tried to start but battery dead. The fusible link is also likely blown. Jul 12, 2007 · The field and sense wire are 2 different wires. What Does an Alternator Do? An alternator works with your battery to charge your vehicle’s electrical systems. Any idea where to start. Always hook up your battery terminals correctly, as the alternator may be damaged if the battery is hooked up backward. Battery was at 8 volts and dropping. Sometimes it will blow instruments and the tach. I guess we'll start at measuring the output from the The traditional solutions to this problem are to use a lead-acid battery for the house loads and lose all the benefits you wanted, or scrap the lead-acid starting battery, modify the alternator and/or add a smart external regulator. CA UTION Be sure the battery cables are connected to their proper terminals. Jul 14, 2018 · The problem is that he hooked up the battery backwards. Hooked up a car battery backwards. I have a '92 Civic and I hooked up my battery backwards and tried to start the car. if large fuse or fuselinks blown that's good, to protect the circuits although the alternator diodes are fed direct and will take a reverse voltage hit and maybe breakdown. Mar 08, 2019 · New cars have a negative earth so reversing the battery would mean that the new car engine management computer would not function, and the ignition would not come on and the start relay would not function. . The heavy current wiring / battery / alternator on the car that you were using to jump start yours might not have faired so well though. It actually puts out 0 voltage. 2 volts at battery posts while its running. I would suggest performing a visual check in the fuse/relay box with a flashlight. New cars have a negative earth so reversing the battery would mean that the 1 Apr 2019 Connecting the jumper cables backward or installing a new battery the You decided to change the car battery but accidentally put the cables backward. When the engine is running and the alternator is turned on, the alternator generates 14 volts or 28 volts, slightly higher than the battery voltage so it keeps the battery charged. 7 to 14. Sep 18, 2013 · Dead battery. 30 Oct 2018 (did I put the battery in backwards this time) I did not watch to see if the battery I needed a positive ground alternator but could not get one. com FREE DELIVERY possible on eligible purchases The battery should be OK, but some of your electronics would be fried. I put the battery in without the tray so I could run the car while being able to access the FCM. Totally forgot, I guess i let someone try to cut the cat off. 5 Volts the Voltage Regulator needs replacing (Part of the Alternator) and may have cooked the battery. On later model vehicle they are all packaged into one large fuse bar that flows power from the battery and alternator to the vehicle. An alternator that’s going bad can affect your car in many ways. If they failed closed, they will by and by, fail open. O'Riley's kid changed it - backwards at first - a couple sparks later it was the right way. If the alternator fails the ammeter shows discharge, a negative voltage if you will, because it is reading (battery voltage) electron flow from the battery. 2003 Mitsubishi Galant ES Hello, this morning, I managed to do an incredibly dumb things and install a car battery backwards into my 2003 Mitsubishi Galant ES. There are also two related misconceptions that stem from this. Where is the wire that goes to the battery to The voltage regulator is a simple switching device that keeps the alternator from overcharging the battery and, at the same time, helps keep the battery charged to 13-14 volts. Bad Alternator Sign #1: Flickering Headlights The battery in the car is used for starting the thing, and to smooth out the alternator output. If you popped it, the alternator won't charge the battery, which could explain not being able to start it a second time. If you have ever connected up your batteries backwards, even for a split second, your rectifier is toast. Buy Performance Tool W2989 Battery/Alternator Tester Battery Alternator Tester: Automotive - Amazon. i had everything on to test the alternator. Jul 14, 2011 · With all the things pulling a charge off the cranking battery ( Motor starting – 150 HP, Graph, Livewell pumps,Ect. Replaced my alternator. Buy OBDMONSTER 12V Car Battery Tester Digital Alternator Tester, Check Battery Condition & Alternator Charging for Car Motorcycle: Battery Testers 1 Jun 2009 If its an electronic ignition, then I would bet that it's done for. If they failed open, things will run, but the battery will not charge. Apr 01, 2019 · When a car battery is connected backward a fuse designed to protect vehicle electronics should blow. May 06, 2008 · the alternator will be the first thing that goes out on it,when feeding voltage back through them it does damage to them,other than that you may get lucky ,try another battery and see if it does anything,that's all you can do when you hook one up backwards is try it and see if it did any damage to it,good luck with it. You can destroy electronics, particularly the various computers - and these are hooked up the battery backwards :( My new battery had the red cap on the negative. Aug 16, 2010 · According to the diagram I have the Battery wire hooked up correctly. it will not charge the battery up. He immediately shut the car down and had it towed home. In this case there needs to be another conventional battery, usually a start battery, for the alternator to charge. But seems to work ok. ) I like to put a charger on it after each outing – sometime i don’t run the big motor all that much to have it keep the battery fully charged off of it. DO NOT wire this backwards or it will not work properly. Of course, what I didn't notice is that the terminals were switched on these two batteries and so I made my stupid, novice mistake- I connected it backwards. And I love that no start check list and all but some real world hey I've done it here's what to look for would be good. 5 for 2 seconds, then immediately it showed battery in my dash right above the miles and also the symbol appeared, I already change the battery, the alternator, #15 fuse for radio, all the other fuses are good, what am I missing, where else do I need to check, I noticed that the lights for the A/C, 4 X 4 look weak. 6 of them are wound clockwise and the other 6 counter clockwise to create AC. The battery on my dad's camry was (allegedly) dead. If it goes over 14. I had been working on my car all day and when the day was over I had a new battery to put in and I was exhausted and the new battery I bought wasn't marked well with a small black + and - on a all black battery. I smoked the + battery-alternator lead almost immediately and also another lead from the alternator with a fusable link that did it's job. Many fuses were blown including the main 100Ah one. Once its fixed it will be my 4th alternator in less than 80k miles. I replaced the fuses but my car won't start still. Alternator not charging battery 1 Answer. good luck with your findings When connecting the battery backwards, the alternator is almost a dead short across the battery, and you may have burned off a connection or a wire that's involved in both the ignition system. I use one for the house bank and one fuse for the alternator which I generally always If the battery is weak and the alternator is not working, the engine may not have enough electrical current to fire the spark plugs, so the engine will stop running. Aug 20, 2009 · Thanks guys i had a question about the voltage regulator cause i just installed the new alternator and my user mistake forgot to charge my battery so i just tried starting it and the car started but still died after about 7 minutes running. He hooked the battery up backwards in his 87 Ford Ranger. Mar 10, 2013 · Hooking up the battery backwards will usually burn out the diodes in the alternator although your car may have saved it by virtue of the fusible links. When i went to connect the negative terminal back to the battery sparks went crazy. 5 battery hooked backwards!! I did find the fuses like you said chiefalen. I have not found any shorted wires yet. Battery explosions will cause burns, permanent disfiguration and blindness. It doesn’t drain the battery now but it doesn’t charge it either. The battery is just there for starting, storing extra power produced by the alternator, and delivering extra current if the alternator isn't producing enough. if alternator is ok. The tractor charged the battery backwards so - is now + I put a meter on the battery and the needle swings backwards. How to Fix Jeep Grand Cherokee Alternator Not Charging With the battery removed find a spot on the fender well to attach the voltage regulator. Hooked it up backwards. there should be at least 13. The second cables are hooked up backwards it will blow a fuse or blow up battery. . So my husband tried to replace the alternator and battery of my 07 4 cylinder malibu. Welcome to the North American Subaru Impreza Owners Club: Saturday January 4, 2020 Dec 27, 2019 · what diagnosis did you do to establish you needed a new battery. If the car stops, then you most likely have a problem with the alternator. 0 with a 3G alternator. I'm guessing he fried a fusible link. Connecting the battery backwards will reverse the polarity and damage the alternator. Thinking the old alternator may not have been bad after all, I took it to an alternator shop to be bench tested. you are very lucky! Re: omc 2. They had a big surprise. After I replaced the fuse, the car ran for a day, but has not started since. That was in backwards as well and we ended up putting in another battery and starter this time correctly place Jan 19, 2019 · Usually, the first sign that your charging system is in trouble is a "battery," "ALT," or "CHARGE" warning light illuminating on your instrument panel while driving. If the engine of the vehicle with the charged battery is left running, the electrical surge can damage this vehicle's alternator. As you may know, when the battery is hooked up backwards, reversing the polarity, will typically cause the alternator to fail. The alternator is NOT suposed to spark, it If you reversed the battery terminals for more than a VERY short period of time (one second?), you HAVE blown the alternator diodes. Some circuits have reverse diode protection to prevent damage but this cannot be easily done on any output transistors, those can fry. 5 Volts Your Alternator may need replacing. Re: Battery hooked up backwards,OOP! Speaking from the collector car world you shouldn't have a problem unless you have an alternator and/or electronics. The alternator fuse was blown (the big one). If your vehicle doesn't have a fuse (almost all cars do) designed for this purpose, you will send electrical current backward through systems in your car including ECU, transmission control unit and more. boosted from a car or truck with the cables backwards on the tractor so it started. Once you start the car, your electrical system is run completely by the alternator. The reverse polarity caused a few fuses to blow but most importantly the 120 amp alternator fuse burned. I have a 1968 Corvette 327 and my son put the battery in backwards 6 Jun 2017 It is also possible that an unfused accessory such as the alternator You can test the starter by jumpering the battery to the solenoid, but my Almost all drivers know that a car with a dead battery can be started by jumping battery is left running, the electrical surge can damage this vehicle's alternator. • Always follow specs for engine speed when grounding terminal "F to bypass the regulator. You can automatically assume there’s a battery problem when the reading is lower. guess how I know that, LOL). One of the small wires coming off the starter solenoid began to spark and smoke, and I disconnected the battery immediately. When you connect the battery backwards you can cause major damage. A simple test to check the working of the alternator is by running your car; and then unplugging the positive connection of the battery. any ideas on how to fix would be greatly appreciated You actually have it a little backwards, the vehicle's electrical system is actually powered directly by the alternator. It is possible the starter motor would try to spin in reverse against the flywheel, but I believe the starter solenoid would also be reverse, so it wouldn't be pressed against flywheel and jammed. I am wondering if the original problem was the alternator and not the battery (faulty alternator was flattening the battery). Dec 14, 2014 · I connected the battery backwards. Car Won't Start: Alternator or Battery? The easy way to know - Duration: 13:14. also i think it did something to the alternator because before i did this it was putting out 14 volt and now it is only putting out around 12 volt. Car wouldn't start without a jump, wouldn't hold a charge at all. Hooked up battery backwards misfire issue Electrical & Lighting. Your hood should normalize after a manual operation. one of the wires that goes from the solenoid to the alternator smoked pretty bad when i had the battery backwards, it did not break but melted the coating. I have a 1992 Camry. You can destroy electronics, particularly the various computers - and these are Feb 14, 2008 · have the alternator and the battery checked if those check out OK then you might have a blown fuse or fusible link in the wiring between the battery and alternator or battery and starter. Muddinfun, Jul 14, 2018 #4. Jan 14, 2014 · I hooked the battery backwards in my 2005 Chevy Colorado 3. Happens a lot on cars with generators and the worst thing is the battery meter reads charge when it's discharging and vice versa The alternator has diodes that are one-way valves for electrical current. There are several signs you need to watch for that may indicate your alternator is bad. In my experience when the battery has been hooked up backwards the computer will take some kind of damage. Switch off the engine and check the tension on the drive belt. Needed a simple battery change. The battery in the car is used for starting the thing, and to smooth out the alternator output. If you clean tape up wire when done. Your 90 horse Merc has 12 poles as part of the stator. Now the A/C and radio don't work. He said smoke came out of a plastic box near the battery. 27 Apr 2018 I then realized that I had the battery in backwards, as the negative The door ajar light, alternator light, and power steering light are on. I went to replace my battery yesterday and upon getting a new battery I made a huge mistake. I installed a new "rebuilt" alternator and new battery, truck started and runs great. People over look under coating of red battery wire,slice coating 3 inches on the side and look for green crud and clean or replace. • Never ground alternator output terminal "B. Reconnect the positive battery cable, then the negative cable. High speeds may cause excess output that could damage components. I replaced both for about $3 from autozone. After switching the cables, to my surprise she fired right up but the alternator seems fried and the stereo won't turn on Mar 17, 2013 · my son installed the battery backwards on our 2008 kia rio 5 door. I ended up replacing the alternator and the main power wire that connects the alternator because that was melted to shit. You can check the amount of A/C voltage leaving the alternator by putting your multimeter leads on the battery (Positive lead on +, and Negative lead on -), with you multimeter set on A/C voltage you should read no greater than . The alternator diodes would not like being connected in reverse, and the alternator could possibly try to become a motor and turn the engine. But battery light is still on. Headlights and Even when the alternator is functional, if the wiring between it and the battery is damaged, it won't keep the battery charged. I was pretty positive it was the alternator because I tested the battery when the car was on, and it was only 12 volts. Based on your "click" comment I would go after a bad ground first but with the light staying on after starting would seem to indicate that you have a problem with the charging output side, so maybe two problems are involved. While she was thanking me and such her BF hooked up my battery backwards while the car was still idling. But sence the alternator is smoking when you hook up the other cars battery then you know that the power is getting to the alternator threw the wiring, so the wiring is probably fine. After switching the cables, to my surprise she fired right up but the alternator seems fried and the stereo won't turn on thank you everyone for your replys. Is this true? Apr 07, 2017 · Ok so I made a careless mistake of hooking my battery up backwards. Electrical is my weakest area…thanks for your help…Mike Always hook up your battery terminals correctly, as the alternator may be damaged if the battery is hooked up backward. Just an fyi, a bad diode in the alternator can drain the battery even when the engine is not running. If, however, the key is on a great deal of damage can be done. Dec 16, 2007 · Some drunken fool hooked up my battery backwards, now what? I am going to rephrase the question since I got so many different answers. I didn't try to start it though because once I connected the terminals there was a small spark. Any help is appreciated. Jan 03, 2013 · Check the rectifier/regulator - it is a direct connection between the battery and ground - hook the battery up backwards and either they will burn out (like a fuse) or they will let current flow through the alternator damaging the coils - if the rec/reg is ok, test the alternator Nov 29, 2010 · My friends 06 GT has been plaqued with a few problems and the latest is the alternator cable that attaches at the battery terminal began smoking and melted the shrink wrapping. Your charging system is responsible for restoring the charge to your car battery after use and is tasked with providing power to your lights, audio system, and other electronics while your vehicle is running. Blowing the 25A fuse is "the failure". I have a 5hp B&S engine, access plenty of junk vehicles (mainly Fords, but this is not about Ford vs GM, simply a reference to the type of alternators I have around), a PM motor that I used in a wind power experiment, controller for said wind experiment, welder, metal, etc. If the battery will not charge, the fault may be the battery, rectifier (diode), regulator/rectifier or stator. the alternator has the rectifier built into it. This happens when you hook up a battery backwards, hook up jumper cables backwards etc. On Friday sept 6th my alternator failed again and destroyed the in-line fuse and killed the battery. Replaced the link. good luck with your findings The diodes in the alternator were blown by the backwards polarity. That fuse is designed to protect the wiring from overheating and melting. There is continutiy between the smaller black box, but not the larger one that has the black cable running to the alternator. i have changed all the blown fuse there were a couple. I've seen it with my own eyes on a 2013 Odyssey. Replaced 120A alternator with a 90A I had on hand, and battery now charges. enough to go Of course, what I didn't notice is that the terminals were switched on these two batteries and so I made my stupid, novice mistake- I connected it backwards. Or it may just need the Drive Belt adjusting (Normally this is indicated by the Red ignition light staying on) Nov 09, 2014 · BTW, your alternator may not bootstrap if that trouble lamp in the dash ever burns out. Never owning a Ranger I Re: Hooked battery up backwards JD LT 133 My bet is it either blew the fuse to the alternator, or if unfused, it burned the diodes out in the alternator. Hooking it up backwards won't make too much current flow through the wires *** I never said it will cause too much current. Many vehicles now have large fuses just for the alternator. My old battery failed to start, so I took a working battery out of one of my other vehicles with a badly slipping transmission. When I replaced my battery the car ran completely fine for 2 weeks before it stopped working so I just wanted to make sure that it was because the battery was May 31, 2016 · TOYOTA RAV4 BATTERY JUMPED BACKWARDS - Duration: 18:16. anyways I tried starting the engine before figuring it out. Two days later that part failed and took it back to the dealership and they swapped the part again free of charge. bought a battery whose terminals were opposite of my last battery. I have the alternator wire from the wiring harness hooked up at position #2 on the alternator, position #1 on the alternator is what appears to be a ground connection on my alternator (black wire with a ring connector on it) and I have that routed to the battery stud (which I am now thinking is incorrect). Dec 26, 2012 · "If you connected the battery in reverse that will certainly fry the alternator and cause damage to any other polarity sensitive components as well. DISCONNECT BATTERY before folling with it! You have to remove the alternator from the vehicle, turn it around and on the back side, there is a black module - this is the voltage regulator. I hooked up my battery backwards and blew an inline fuse at the time I did not know this so I changed my battery and alternator and now every two months my car dies and it shows that the alternato Aug 31, 2008 · Cant believe i did this but i did, i put my new battery in backwards on my 1990 LS400. cleaning the battery posts. but it seems to me that it is one thing somewhere. I’d like to test the alternator w the meter but don’t know where to touch the contacts. Wasnt even paying attention. If the key is off the damage is often just fusible links and fuses and the alternator. Connecting the battery charger in reverse has not caused your problems, lack of battery power has. I see wire from alternator body goes into the harness, then there is a plug that goes to the voltage regulator. He replaced the starter. hooked up the battery backwards :( My new battery had the red cap on the negative. Is this true? Jan 13, 2011 · I think alternator or dirty,corroided battery wires or connectors was bad to start with. Hooked up the car battery correctly and the car started right up Jan 15, 2019 · Signs of a Bad Alternator or Battery Your stomach sinks as you put in your key, only to have your car not turn on. Not happy at this point, but it is what it is, a 6 year old battery needs to be replaced anyway. As was posted above turn the steering from lock to lock several times and the ABS light will go out. I have some parts lying around I think I need to put to work. I bought a new battery and connected it to my car backwards. ok. I still think alternator. I connected it the right way and now car won't start. If the battery is working properly and nothing is wrong with it, then it's the alternator that will more likely cause a problem. When I went to replace the battery it was dark and I had no flashlight so I put the new battery in with the same orientation as the old one assuming the terminals would be the same. When I replaced my battery the car ran completely fine for 2 weeks before it stopped working so I just wanted to make sure that it was because the battery was Mar 08, 2010 · I just bought a new battery, and it kept going dead when I was driving it. My battery got fried and also blew the 120A alternator fuse along with ABS fuse and a few others. This is when I realized my error, I reconnected my battery correctly and it fired right up. That small current provides the initial rotor current to get the alternator going right after engine start. I said no REASONABLE diode because there are some heatsunk monsters that MIGHT. I had a mechanic change those things. " It has battery voltage present at all times, even with the Jun 17, 2016 · If the battery voltage is below 14V (or so) it closes and puts current through the alternator rotor which causes the field coil voltage to increase. Camry 4cyl. See above. he has changed the fuses and got it to start and the radio working but the heater blower (tested, good blower) won't blow and the charging system indicator little red battery stays lit. No difference in cluster (aside from battery light no longer being on). If you unplug the alternator connector you'll see the light go out so the alternator definitely sets the light. Check that the alternator is actually turning. The alternator produces AC current, the rectifier converts it to DC for the car battery. But something else Fusable links will not fry from hooking up the battery backwards. Any one of these symptoms can be a sign of a weak charging system. jump start car, if it will. May 25, 2019 · Hello, I have a 1990 Mustang 5. Jan 03, 2013 · Check the rectifier/regulator - it is a direct connection between the battery and ground - hook the battery up backwards and either they will burn out (like a fuse) or they will let current flow through the alternator damaging the coils - if the rec/reg is ok, test the alternator Hey guys, some of you may remember a month or so ago my one wire power master alternator was draining the battery on my 70 Duster so I sent it in for repairs, they sent it back and it was working fine until the other day. As there is no bench test for regulator/rectifiers, test AC output from the stator. 9 Mar 2019 On a very old car, a positive earth would be correct and it should start and run ok) . Many relays, the computer, the ignitin switch, etc. Flickering gauges. Hooking up the battery backwards will usually burn out the diodes in the alternator 3 Jan 2019 Some Lexus models have reversed battery poles that can fool even the a late- model Toyota or Lexus backwards is that usually the alternator 8 Sep 2017 Alternator not charging battery - I hooked up my battery backwards and blew an inline fuse at the time I did not know this so I changed my Charging a battery can help extend the battery's life and potentially save you money. I am not familiar with the wiring diagram on your car, but checking the fusible links is a good way to proceed. But if IIRC, they are about the size of an outboard motor. When an alternator begins to fail — or fails outright — the car's battery begins to take up the slack rather than acting as a capacitor for the system by receiving a constant infusion of electrical power from the alternator. it may also spin backwards and will have to have its connections reversed. The Oreilly's test shows bad diode and when I take the alternator out it shows good regulator, alternator and rectifier. The guy at the shop said my old alternator was Jul 22, 2009 · When you connect the battery backwards you can cause major damage. NEVER jump a dead battery and try and start the car, the power requirement on the alternator to charge at full rate will overheat the alternator. Well when the guy did he put the terminals on backwards!! When he did it the horn steady beeped and it sparked and the headlights came on. Though the problem was fixed by changing a fuse and a terminal in the main fuse box, I am concerned that this may have cuased other programs (i. If the battery voltage is above 14V the switch opens and thus no current flows through the rotor and the main field coil voltage drops. 1 with my small multimeter. That car's alternator and battery will have been pushing a Oct 29, 2019 · The most common reason for an alternator failing to charge a battery is one of them going bad. Check voltage drop on red cable from battery to alternator and also do an alternator ripple test. Firstly disconnect the ground cable on the battery for several mins and then re-connect it. Even if there were to be a low enough resistance for the battery to explode, the fuses would pop before the battery could reach that kind of critical point. I replaced the alternator on my 2011 Chrysler Town and Country Limited. There was a large spark and obviously no power anywhere. There was smoke by the starter solenoid it was only connected for about 2 seconds. ADVANCED LEVEL AUTO 45,066 views. The field wire is the one closest to the positive output stud on the back of the alternator, and should be connected to a switched hot battery source (but not the lead to the distributor, otherwise the engine will not cut off with the ignition switch. When I rehooked it correctly I noticed only thr headlights would work then checked fuses it blowed the main 100 amp fuse others were good. 5VAC, if you get more, your rectifier bridge on your alternator Dec 01, 2008 · first connecting a battery backwards shouldn't fry a good alternator as there is a fuse that is supposed to protect that however you said you got the alternator from auto zone :( i cant install them as the failure rate is to high my warranty is 1 year on all my work and it costs my to much if i warranty to often Jun 25, 2012 · It sounds like a bad alternator to me, it's possible that your old battery was fine but just not getting charged enough (although at 7 years old it's time to replace it anyway) If the alternator was bad, then driving to autozone and then back could be enough to drain the battery - particularly since it sat for a few days after that. we changed the altenator but the light went out for a few seconds and the blower worked but then the little If you have a dead battery, the correct procedure is to disconnect the battery, charge it to fully-charged, check it and refit to the car. Why is the battery light on? Thank you If the voltage regulator through the alternator or starter provided a direct short when reversed, then the battery would emit sparks and boil and could do bad things. Likely your replacement (unknown) alternator also has bad diodes, or bad brushes. Yesterday I went to hook up a new battery and accidentally connected the battery wrong. 8 May 2012 Can a battery, after installation, reverse its own polarity? Because the reversed battery is no longer formatted correctly, it will only work to a disregard the spark and put it on anyway it starts to smoke where the alternator is. Sure enough, the NEW battery was draining, and the worker confirmed that the alternator must be the culprit after all. Well I put the battery in sideways for easier acess and that's when I got careless and hooked them up backwards for a few seconds and then realized what I did. Thats how I knew I connected it the wrong way. reason is because the batteries are rated at either 12 or 24 volts. 2006 ram 1500 with the hemi has 99k miles. The 50-amp alternator was added in 1973 when they added fresh air fans and other extra electrical items to the cars. you are very lucky! Jul 13, 2016 · Q: What hook up battery backwards it popped the fuse is guaranteed and a stereo capacitor tap sounds like starter and solenoid are working but it won't turn There is a good chance another circuit may have been damaged by the As you can see, if the battery is connected with reversed polarity, all the diodes are forward biased and current flow is limited only by the resistance of the circuit elements themselves, that is, the wires, the terminals, the battery internal resistance, and so on. But just to clarify, I had the battery tray out to run a few voltage tests on the FCM. I took the alternator off, took it to pep boys, they tested it, and the alternator is fine, was putting out 14. So he bought a new battery. ; Dim lights. You can easily test the voltage by connecting a voltmeter to your battery while the engine is off. something volts. If the battery and AC output are OK, replace the regulator/rectifier Feb 14, 2008 · have the alternator and the battery checked if those check out OK then you might have a blown fuse or fusible link in the wiring between the battery and alternator or battery and starter. And now I'm getting no spark at all. You actually have it a little backwards, the vehicle's electrical system is actually powered directly by the alternator. Alternator "Troubleshooting" [97 850] Topic is solved Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine. Jul 13, 2016 · Q: What hook up battery backwards it popped the fuse is guaranteed and a stereo capacitor tap sounds like starter and solenoid are working but it won't turn There is a good chance another circuit may have been damaged by the Dec 19, 2017 · When the battery gets full the BMS needs to shut off the charge. I am checking PCM, ECU, etc. If your car won’t start, it’s often due to a malfunction of either the battery or the alternator. Jul 22, 2009 · When you connect the battery backwards you can cause major damage. I checked all fuses on the driver side (interior) and they were I did check fuses, there were four that were blown and stater solenoid on firewall was bad and replaced. See Figure 4. With the colder weather the battery becomes weaker by the cold. It is known as 'bang-bang control'. Just like if you hook a digital voltmeter to a battery backwards. Aug 31, 2006 · I installed the car battery backwards (2003 Mazda Protege). The starter acts weaker, the battery displaces more current and so the alternator must make up all the losses in amps, but you do not drive at higher speeds long enough to charge that battery and bangno start or weak start the next time. One of them was blown, the other was good. Then it was running rough and gas pedal wouldn't Oct 29, 2005 · A friend of mine called me from 1500 miles away. It means that for some reason, the alternator has stopped charging the battery and your car is running on battery power. You can destroy electronics, particularly the various computers - and these are Hi I have a 2000 dodge grand caravan. A troubleshooting flow chart will usually start at the battery and work backwards. Oct 29, 2019 · The most common reason for an alternator failing to charge a battery is one of them going bad. When he connected the battery up the correct way the truck is dead. Yes, it has a regulator. That wire then runs is then tied into the loom of the main harness. I took the battery out to charge it then hooked back one morning and hooked it up backwards. And it was dark with bad light and in a rush I hooked it up backwards. I hooked the jumper cables backwards. Testimonial: " No, the original alternator died, killing the battery, so I put a new alternator in, battery backwards, killed new alternator, replaced alternator, installed battery properly, truck starts ok, lights work, radio dead, but battery doesn't receive charge. I blew the battery fuse. battery backwards alternator