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Toyota Tundra Electrical - Slow Batty Draining

Tiny
PBKING4
  • MEMBER
  • TOYOTA PICKUP
2003 Tundra, V8, 4.7L; installed a new battery three weeks ago.

The battery is not holding a charge after a week or so of sitting idle. Old battery had this problem and I attributed it to a bad battery.

I can't see any reason for the drain/discharge. All electrical items seems to function okay. Any suggestions on how to troubleshoot? How/where to check voltage. What it could be?

Thanks,

Paul
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Saturday, February 17th, 2007 AT 2:20 PM

2 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
There is a parasitic drain somewhere. Using a multimeter find out what the drain is in milliamps. One by one pull a fuse until you see the drop, then narrow down the part of that circuit is the problem.
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Saturday, February 17th, 2007 AT 3:22 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Anything over.030ma is a No no-if its over its time to break out the high tech short circuit finder to track the culprit.
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Sunday, February 18th, 2007 AT 5:23 AM

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