alt not charging battery but alt in testing good
Thread Starter
Junior Member
Joined: Jul 2003
Posts: 9
Likes: 0
From: New York, Weedsport
Car: 85 iroc z28
Engine: 305 tpi
alt not charging battery but alt in testing good
any help would be nice....my altinator is testing good from my local auto store but i cant figure out why my alt is not putting any power to my battery is my wiring wrong or or something else please help
Supreme Member
iTrader: (3)
Joined: Nov 2001
Posts: 2,428
Likes: 2
From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: alt not charging battery but alt in testing good
The power wire from the alternator usually goes down to the large positive post on the starter where the battery cable connects.
Supreme Member
iTrader: (1)
Joined: Mar 2007
Posts: 3,525
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: alt not charging battery but alt in testing good
Have your battery tested, it may just not be able to hold a charge. If that checks out then its got to be a wire issue.
Thread Starter
Junior Member
Joined: Jul 2003
Posts: 9
Likes: 0
From: New York, Weedsport
Car: 85 iroc z28
Engine: 305 tpi
Re: alt not charging battery but alt in testing good
the battery is a week old but we just noticed it wasent getting a charge back to it yesterday....haha when the car lost juice on a test run.....so we could of smoked the battery so that might be an issue...im going to check the starter......my volts gauge shows it at 13v when i start it and slowly drains down to under ten
Supreme Member
iTrader: (3)
Joined: Nov 2001
Posts: 2,428
Likes: 2
From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: alt not charging battery but alt in testing good
the battery is a week old but we just noticed it wasent getting a charge back to it yesterday....haha when the car lost juice on a test run.....so we could of smoked the battery so that might be an issue...im going to check the starter......my volts gauge shows it at 13v when i start it and slowly drains down to under ten
Likely problems are loose connections at the starter, and/or a bad cable between the alternator and starter, and/or a bad large cable between the battery and the starter.
There is a possible chance that you have a bad or damaged battery, but that chance is pretty low.
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