C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Aug 11, 2001 | 03:47 PM
  #1  
RUSTY79L82's Avatar
RUSTY79L82
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From: HUMMELSTOWN , PA
Default battary drain

went out to go for a ride dead batt it was six years old so i got a new one but thay did a test on the old one and said it was just discharged not bad alt is good how do i check for a drain
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Old Aug 11, 2001 | 04:19 PM
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From: Pickerington Ohio
Default Re: battary drain (RUSTY79L82)

Take off the positive battery cable and put a 12V test light between the cable and the battery terminal. Make sure the dome light is off. The test light should be off or very dim(because of clock). If light is bright start by disconnecting the alternator, if light goes out you have found your problem. A reversed polarity diode in an alternator can cause a drain but still charge when car is running. If light is still on after you disconnect the alt. ,then start pulling fuses till you find the circuit that is causing the drain. If after pulling all the fuses you still have a bright light then you must check the circuits that are not fused,like the headlamps, starter, ignition switch etc. Hope this helps.
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Old Aug 11, 2001 | 06:03 PM
  #3  
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RUSTY79L82
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From: HUMMELSTOWN , PA
Default Re: battary drain (redvetteman)

thanks redvetteman i did what you said and i have no light i guess thats good ill just drive it and see
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Old Aug 12, 2001 | 12:02 PM
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Default Re: battary drain (RUSTY79L82)

I had the same problem last week (dead battery) and after charging the battery found that the passenger door was ajar leaving the interior lights on.

Nice to repair something without using "Doctor Green$$$."
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Old Aug 12, 2001 | 10:05 PM
  #5  
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From: grand rapids, lowell mi. area
Default Re: battary drain (RUSTY79L82)

Hey Rusty
If you havnt found your problem with that battery drain, it could also be the interior delay switch that is bad, if you are interested ,I can tell you how to get to it ,its not that hard!!!!!!!

YO BILL
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