What Could Cause an Alternator to Overcharge the Battery in a 07 Avalanche

cube4da999

my alternator went on my 02 avaanche changed it then it work for like 6 hours does or did anyone accept the same trouble practise not know what to practise

ygmn

Need a little more info...

Like what happened with outset to retrieve information technology was bad?
then what happened afterward six hours that it does not work anymore?

cube4da999

was driving and saw that the battery lite came on the went off went to piece of work put the multimeteron it an it was charging merely under load was non so it just shut downwards all together the alternator so i inverse it and it was working fine underloads and every thing drove home stoped at a friends shop then boom terminate charging once more cheked to come across if the groand and the positive cable both are good out of ideas :help:

DaytonaZ71

could be a lot of things, including the alternator, bank check the cheap stuff first like are the bombardment terminals clean? examine the battery cables most the terminals for signs of green powdery stuff that indicates corrosion. check the connections to the alternator to see if they are tight and corrosion-costless. check your drive belt for tightness, if it's sometime you lot may want to supercede it since they don't show wear very well. as ygmn said, check your battery or meliorate even so borrow a known good i and meet if the problem persists.
of grade, it may non even be a charging problem, information technology could be an electrial part failing and causing a massive power drain. and a hundred other potential things.
skilful luck, hope it's something easy.

cadboy1

If the battery is no skillful or discharged, a fresh alternator tin burn itself out trying to break in and recover the dead bombardment at the same time. I hope you at to the lowest degree charged the battery upward when you installed the new alternator. If not you lot could accept fried it

cadboy1

I see yous are in Valley Stream. Head over to the Autobarn in Lynbrook. They have a Midtronics battery tester that can accurately check the condition of your battery. I personally own i but I alive out in Saint James

cube4da999

I TESTED THE Bombardment AT WORK WE HAVE THE MIDTRONICS AND It SAID IT WAS GOOD AND THE TERMINALS ARE Clean I Fifty-fifty UNHOOKED THE SYSTEM FROM MY TRUCK SO It IS ONLY THE Manufacturing plant THINGS RUNNING I AM GOING TO Merely HAVE TO Bite THE BULLET AND Accept It TO THE DEALER AND PAY MY DE DUCKTABLE

ygmn

cube4da999 said:

.... I EVEN UNHOOKED THE SYSTEM FROM MY TRUCK .....

And what would this be?

I mean if you have a lot of stuff on there that draws more then the alternator can put out...y'all will impale information technology....

BUDMAN

Your alternator can carry the load if yous disconnect the battery once it'due south started. Information technology's a cheap/easy way to test the alternator.

I only replaced my alternator near 3 weeks ago on my '02 AV. After disconnecting the bombardment, it died pretty quick. Examination indicated a bad diode Whatsoever information technology was, it'due south no longer a problem.

cadboy1

BUDMAN said:

Your alternator tin can comport the load if you lot disconnect the battery once it'south started.? It's a cheap/easy way to test the alternator.

I just replaced my alternator most iii weeks ago on my '02 AV.? Afterward disconnecting the battery, it died pretty quick.? Test indicated a bad diode? Whatever it was, it's no longer a problem.

That'due south kind of a neanderthal fashion of checking that started in the 40`s and 50`s when cars had generators and not alternators. Removing the cable with the vehicle running not only risks sparks and potential battery explosion it also can burn out PCM`s and the alternator itself

Warning: Never disconnect a bombardment cable while the engine is running to "test" the alternator. Doing so tin cause high voltage spikes that can damage the alternator also equally other electronics.

JSal69

cadboy1 said:

That'due south kind of a neanderthal way of checking that started in the xl`due south and 50`s when cars had generators and not alternators. Removing the cablevision with the vehicle running not only risks sparks and potential bombardment explosion information technology too tin can burn down out PCM`due south and the alternator itself

Warning: Never disconnect a bombardment cablevision while the engine is running to "exam" the alternator. Doing and so can cause high voltage spikes that can impairment the alternator too every bit other electronics.

Amen Brother

cube4da999

BUT LEFT THE Arrangement UN HOOKED SINCE I PUT NEW ALTERNATOR IN AND TRIED THE THING WHEN LEAVING THE Auto RUNNING THEN UN HOOKED BATTERY IT DIES AND WHEN I REMOTE Get-go It It DIES I AM Just GOING TO Render THE ALTERNATOR AND GET ANOTHER AND Encounter WHAT HAPPENS Maybe Just GOT A BAD ONE IT WAS REBUILT NOT FROM DEALER

BUDMAN

cadboy1 said:

That's kind of a neanderthal mode of checking that started in the xl`s and 50`s when cars had generators and not alternators. Removing the cable with the vehicle running not simply risks sparks and potential bombardment explosion it also can burn down out PCM`s and the alternator itself

Alert: Never disconnect a battery cable while the engine is running to "exam" the alternator. Doing and then can cause high voltage spikes that tin can damage the alternator too every bit other electronics.

Yea right. I think I've done it long enough to know what I'grand doing and, hey, if I screw information technology up, I guess that would be a first.....

jkailj

It can crusade voltage spikes equally your alternator will run at a college voltage just to charge the battery. Usually around xiv.7v. Also batteries halfway act every bit a voltage conditioner to ensure consistent and equal voltage to the system. Same style we use transformers to clean up power. Some electronics may be damaged from this. Non to mention the potential spark from pulling the cable that may cause a spike. If it is has worked for you peachy, and no 1 is maxim that it will injure something everytime, but exist enlightened the risk is there.

sennister

cube4da999 said:

BUT LEFT THE SYSTEM UN HOOKED SINCE I PUT NEW ALTERNATOR IN AND TRIED THE THING WHEN LEAVING THE CAR RUNNING THEN United nations HOOKED Battery IT DIES AND WHEN I REMOTE START IT IT DIES I AM Only GOING TO RETURN THE ALTERNATOR AND GET Another AND SEE WHAT HAPPENS MAYBE But GOT A BAD 1 IT WAS REBUILT NOT FROM DEALER

You mentioned it was a rebuilt one. I also went with a rebuilt one but bought mine from a starter/alternator repair shop. If you got it from that type of shop you should be able to accept it back to them and take them test information technology. I would effort and test the alternator justto make sure it tin can be elimiated as a possible source to your problems. Also I know that you stated that you tested your bombardment and information technology was reported equally being good. I know for a fact that many people here in the by have had electrical problems that in the end turned out to be the battery even though it was testing good. Our electrical expert here sperry had taken his AV in something similar 3-4 times when under warranty because the truck wouldn't start. The dealer wouldn't supervene upon the battery unless it tested bad. Everytime information technology tested good. He eventually got tired of always carrying one of those portable jump showtime kits and wondering when the truck would leave him stranded adjacent. He replaced his battery and has never had a problem since. Once more his OEM battery tested good every fourth dimension. The average life of a battery is in the 3-5 years. Information technology is a known issue that the OEM batteries fail closer to the 3 year mark. This is more than so with the 2003 AVs like sperry and I have but either mode y'all are getting to the point where y'all are nearly due for a replacement. If I were you I would pull the alternator and have it tested then if it is adept replace the bombardment even though it has tested practiced.

Another thing that tin harm an alternator as long as people are talking about power spikes is if you lot spring start a vehcile make sure the jumper's engine is off. If not the power spike can blow the diodes in the alternator. So if your battery was dead because of the bad original alternator, it was replaced and and so you jumped the truck it could have fried the new alternator. That is what happened to me. My bombardment went bad. I couldn't jump my truck because my cables weren't long enough and the only other vehcile that was at my house at the time was the motorcycle. So I called AAA the tow truck jumped my truck with his running. About 2 weeks subsequently I had to replace my alternator.

cadboy1

No thing how you endeavor to explicate it some people just don't get information technology and never will If you want to play Russian roulette with your electrical system you are free to do so. Even if the truck stays running what does that hateful Takes very little current to do that. Y'all learned zippo and risk alot.

Test the alternator by disconnecting the bombardment with the engine running=

A bombardment equally like a voltage stabilizer or filter to the pulsating DC produced past the alternator. Disconnecting a battery while the engine is running tin can destroy the electronic components, e.thou., computers, radio, stereo, alarm system, etc., or the charging system. Just say NO! if anyone suggests this.

cube4da999

TO SWITCH THE ALTERNATO Volition Non COST ANYTHING AND I Have A BATTERY I Tin can SWITCH IT WITH Will TRY TO SEE WHAT HAPPENS CAN Non HERT TO TRY

sennister

cube4da999 said:

TO SWITCH THE ALTERNATO Will NOT COST ANYTHING AND I Have A Battery I Tin can SWITCH It WITH WILL TRY TO SEE WHAT HAPPENS CAN Not HERT TO Effort

Yeah, I agree information technology won't toll anything I'thou just maxim that if the identify where yous bought it is a shop that rebuilds them when you take it back enquire them to test it. They shouldn't charge you for that as they would test it anyhow to find out why information technology came back. If you bought it at a local parts store like a Napa or what ever they may non have the equipment to test it. I wouldn't worry nigh it so and merely swap it out for a new one. If they accept the ways to test it should only take 5 min of your time just I wouldn't take information technology somewhere else and pay to have information technology tested. And then if yous accept a bombardment y'all can bandy out fifty-fifty better. That manner you lot tin can eliminate that as well. I know you said you cleaned your battery terminals only what about that red connection block nigh the power steering pump? I'one thousand simply trying to throw out some more ideas for yous.

cube4da999

I Think I Will TAKE THE Ground OFF THE MOTOR AND And then BATTERY TO Make SURE BOTH ENDS ARE CLEAN AND THE POWER AS WELL ON THE BATTERY AND THE NEAR THE POWERSTEERING TO Run into WHATS UP Volition Keep ALL INFORMED ON WHAT I FIND

03whitediamond

Information technology's common knowledge whether constructed new or rebuilt that an alternator can contain faulty batches of components, including internal regulators, diodes, etc. I witnessed these is every bit an sometime by (Autozoner) Country Lath Certified Automobile Mechanic/Commerial Accounts Managing director.....many moons ago.

cube4da999

now i replaced the alternator with some other i and hooked everything upwards started the car and the alternator is charging but now the battery light is on call back i establish the the problem even though the battery tested expert i think the battery is no good cables are clean and attached to everything merely battery low-cal is on and sytem is charging what practise you guys think :help:

jkailj

Didn't yous say you had an extra battery? Swap it and come across if it is ok. Likewise, if you lot alternator was bad, your battery is pretty tuckered, I would get alee and get a new i anyway. Simply my .02

sennister

Like I said before other members can adjure to batteries testing good however they ended up existence th esource of bug. The testers are skillful at finding some problems but they have proven to not exist 100% accurate more so with the Air-conditioning Delco batteries that GM uses.

What Could Cause an Alternator to Overcharge the Battery in a 07 Avalanche

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