1998 Chevrolet Blazer Battery drain

1998 CHEVROLET BLAZER
135,000 MILES • 4WD • AUTOMATIC
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KNITTING WOMAN
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battery drains overnight. Everything checked and ok. Happened before and it was the seat warmer we disconnected. Worked fine until 2 weeks ago. Now have to recharge every morning. Everything is turned off at night. Dealership is clueless. Any suggestions as to what it could be.

Jul 26, 2015 at 8:18 AM
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WRENCHTECH
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The dealership is clueless?

Did you give them the vehicle and authorization to spend time troubleshooting?
Jul 26, 2015 at 11:19 AM
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KNITTING WOMAN
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Yes both the dealer and my repair shop had it over night.
Jul 27, 2015 at 9:42 AM
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WRENCHTECH
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I find it hard to believe the dealership could not troubleshoot the problem. This is something they do daily.
Jul 27, 2015 at 1:25 PM
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WRENCHTECH
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I find it hard to believe the dealership could not troubleshoot the problem. This is something they do daily
Jul 27, 2015 at 1:46 PM
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KNITTING WOMAN
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You would think but I did have this before and it was the seat warmer. I figured that out and told them to check it out. They disconnected it and it worked fine for 6 months and now it started in again.
I love my Blazer and don't want to part with it.
Jul 28, 2015 at 2:16 AM
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WRENCHTECH
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I'm sure if you are willing to pay the diagnostic time, the dealer can find the issue. You don't find these things through random guessing. There is a procedure to isolate parasitic battery drain circuit by circuit.
Jul 28, 2015 at 2:23 AM