Voltage Leak!! - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 5 (permalink) Old Mar 2nd, 11, 10:37 PM Thread Starter
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Ryan
 
Join Date: Sep 2010
Location: Castle Rock , Colorado
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Voltage Leak!!

Hey guys, I have a 1971 Chevelle with a 350. I re did some of the wiring 6 months ago (after an electrical fire) that included new alternator, voltage regulator, and battery, along with all the necessary wiring.
Anyway, it ran and charged great up until about a couple months ago. The car sat for a month, then when I went to start it the battery was dead. No big deal I though; I charged the battery and it started right up. However, since then the battery will die practically overnight.
I checked the amperage from the negative battery terminal to the negative battery cable with the car and everything off and it was at 70 milliamps.

Sorry for the long story, but now I'm trying to hunt down the leak. Any suggestions/tips/advice?

Thanks in advance, Ryan

Be the person your dog thinks you are.

1971 Chevelle 350
Tremec 5 Speed/4.10 12 bolt

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post #2 of 5 (permalink) Old Mar 2nd, 11, 10:51 PM
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Randy
 
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Re: Voltage Leak!!

Pull the hot wire off the alternator while checking the ammeter. Next pull 1 fuse at a time until you isolate the short. When you've found which circuit, you'll need to consult a wiring diagram to find exactly where the leakage is.

Randy
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post #3 of 5 (permalink) Old Mar 2nd, 11, 11:03 PM Thread Starter
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Ryan
 
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Re: Voltage Leak!!

Quote:
Originally Posted by pnugene View Post
Pull the hot wire off the alternator while checking the ammeter. Next pull 1 fuse at a time until you isolate the short. When you've found which circuit, you'll need to consult a wiring diagram to find exactly where the leakage is.
This was my original plan. I have done this to my other (newer) car. My only concern for doing it to this one is the wiring is so goofy as is, I'm curious if this will narrow down my problem. The person that had the car before me did some questionable electrical work resulting in the electrical fire.
Since I've had it I've cleaned up what I could but not sure the condition of the rest.
None the less. I will try this tomorrow and let you know if it works!
Thanks!
Ryan

Be the person your dog thinks you are.

1971 Chevelle 350
Tremec 5 Speed/4.10 12 bolt

Some pictures:

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post #4 of 5 (permalink) Old Mar 3rd, 11, 5:06 PM
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Jerry
 
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Re: Voltage Leak!!

I agree with the above regarding tracing down your short. I would add a master disconnect switch on the neg. side of the battery. If the wiring is questionable and the car has suffered a fire in the past, I would use the switch at all times. The switches are about $10 and I use them on all my non daily drivers. Jerry
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post #5 of 5 (permalink) Old Mar 4th, 11, 11:53 AM Thread Starter
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Ryan
 
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Re: Voltage Leak!!

Quote:
Originally Posted by Tampa Jerry View Post
I agree with the above regarding tracing down your short. I would add a master disconnect switch on the neg. side of the battery. If the wiring is questionable and the car has suffered a fire in the past, I would use the switch at all times. The switches are about $10 and I use them on all my non daily drivers. Jerry
That's a good idea. I've been disconnecting the battery every time. A switch is much nicer.
Thanks, Ryan

Be the person your dog thinks you are.

1971 Chevelle 350
Tremec 5 Speed/4.10 12 bolt

Some pictures:

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