Dead Battery - Team Camaro Tech
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post #1 of 5 (permalink) Old Sep 5th, 10, 11:54 AM Thread Starter
 
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Dead Battery

Team,

I have a 67 camaro, just put in a new battery. After several weeks my battery is dead again??? I only drive the car about once a week. I hooked the car up to an amp meter while off (no leakage was detected). I have a dummy light for the alternator, which if I disconnect form the alternator the dummy light comes on (showing no charging right?). What is the problem here?

Thanks, Vinny
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post #2 of 5 (permalink) Old Sep 5th, 10, 12:59 PM
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Re: Dead Battery

If GEN light is off during engine running, alt should be working. A multimeter across the battery posts will show electrical system voltage.

If externally regulated, you will have to rev up the engine to about 2000 rpm to read min 13.5 volts with no acessories on at operating temperature as the battery and ext reg gets warmer, less voltage is needed by the battery to recharge, if you have a mechanical regulator. You can improve by swapping out the mech ext reg for an electronic reg, Wells P/N VR715, plug & play, don't forget the ground strap.

New batteries take a few hundred miles to get fully charged. Starting once a week and driving 50 miles doesn't help too much, but better than letting it set idling as less voltage is available.

At night, you might take a test light and put it between a battery cable and battery post. With OE accessories, there should be no light from the test light. Modern stereo unit would make it glow as memory would be drawing miniscule power, a very light glow. Any more brightness would indicate a light on - glovebox light is one usually seen, if equipped. A repeating short burst of brightness would indicate a clock kicking in to wind the spring to keep time.

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post #3 of 5 (permalink) Old Sep 5th, 10, 02:06 PM
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Re: Dead Battery

Or the trunk light it so equipped.

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post #4 of 5 (permalink) Old Sep 5th, 10, 05:43 PM
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Re: Dead Battery

Lead acid batteries do not like to be left unused and fully charged..screws the cells up.
If screwed it will charge up but will not hold the charge over night or couple days.

Can check the battery with a crabon pile loader and/or buty a cheap battery hydrometer.
look for any cell that stands out as different to the others.

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post #5 of 5 (permalink) Old Sep 5th, 10, 06:18 PM
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Re: Dead Battery

I had that same issue when i drove it once every week or every 2 weeks. I purchased a extra battery and made sure i have warranty. I also got a new alternator with warranty. It's only happened once since then. You need to warm up the car every 2 or 3 days, it helps. I also had the remote wire to the stereo disconnected. Those are just some things i did and it worked, but to each their own.


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