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post #1 of (permalink) Old 06-01-2018 Thread Starter
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Question Old Guy

Hi, I'm new here. Have a 64 Impala SS with a 350. Have had many cars in my 70 years, to many to list. Bought a 64 Impala SS from what was supposed to be a reputable custom car builder. Big mistake. Having problems with battery going dead overnight (new battery). Car was completely dead. I replaced the horn relay first with no luck so I cleaned up all of the ground wires, motor,frame and body. Charged the battery and motor fired and ran on first try. I let it set for 2 days went to start it and it was dead. Any ideas I might try. Any suggestions will be appreciated.
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post #2 of (permalink) Old 06-02-2018
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Welcome to the forum.

Would like to see some pictures of the "ol girl" too.

I would suggest that you use your DVM to find the parasitic draw that you no doubt have somewhere in the system. There are a number of different videos on You Tube how to go about this. On that old car I would suggest that with doors closed ( dome light off ) you should have 0 amps being discharged.
It will have a limited fuse panel so start by taking them out one at a time and see when the meter drops to 0. I would start with the + cable on the alternator and see if it has a bad diode. The headlight switch for the dome light may be an issue as well as it does not supply the power to the light but merely completes the ground.

Good luck

Some things are better left unsaid, which I generally realize right after I have said them.
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post #3 of (permalink) Old 06-03-2018
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Originally Posted by Johns 64 cars View Post
Hi, I'm new here. Have a 64 Impala SS with a 350. Have had many cars in my 70 years, to many to list. Bought a 64 Impala SS from what was supposed to be a reputable custom car builder. Big mistake. Having problems with battery going dead overnight (new battery). Car was completely dead. I replaced the horn relay first with no luck so I cleaned up all of the ground wires, motor,frame and body. Charged the battery and motor fired and ran on first try. I let it set for 2 days went to start it and it was dead. Any ideas I might try. Any suggestions will be appreciated.
Hello!

I agree with retired Pauly.
For a brand new battery to be drained overnight, the parasitic drain has to be pretty big. At work, we accidentally leave 12 Volt power boxes hooked up to the battery on overnight, and the batteries still aren't dead in the morning.
It's probably best to start from the battery with a multi meter, and go on from there to each component. Eventually you'll find something is eating away at your battery. The good news is, those cars are simple enough, it should just be a short exploration adventure to find out why this is happening. Probably something simple!

Good luck!

Last edited by TheCodeMan; 06-03-2018 at 01:18 AM. Reason: Typo
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post #4 of (permalink) Old 06-03-2018
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Welcome!

Good luck finding that short!


Now git me some PICS!

Everyone has a photographic memory; some just don't have film.
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