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Battery drain

Tiny
C_CLARK2255
  • MEMBER
  • 1972 OLDSMOBILE CUTLASS
  • 7.5L
  • V8
  • RWD
  • AUTOMATIC
  • 90,000 MILES
After trying three new batteries the battery still is draining over night. The alternator tested good. Also, the ground battery cable has a charge going to it so when I hold the test light onto it the test light lights up. How can I fix this drain? What do I look for?
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Thursday, October 6th, 2016 AT 9:24 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You need to do a parasitic draw test to see what is doing it. start with glove box/trunk/hood lights first . as those were the big ones that caused it on the earlier models. this article may help.

https://www.2carpros.com/articles/car-battery-dead-overnight
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Thursday, October 6th, 2016 AT 12:10 PM

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