Electrical Issue
Dogdays008
Member Posts: 3
I have a 2005 Tahoe Z71 with 87,000 mile on it. It been babied. I'm having an electrical issue. My vanity lights on both side, my reading lights in the front and back and my rear view mirror doesn't have power (no temp or compass, not sure about the head light dimer) . Both reading lights will come on when I hit the remote or open the door then they will go off. The rear view mirrors On Star also works. All this occurred after I had the battery unhooked. I've checked all the fuses and they are good. Does anyone have a clue what could be going on? Could it be the Body Control Module?
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Comments
How did you test the fuses? Be specific.
Here is a section of the BCM schematic showing the inadvertent power supply output.
The Garage Door opener does NOT get power from the body computer like the vanity lights etc. It gets power from SEO fuse #1 in the under-hood fuse block. This is the same fuse that powers up the fog lights if equipped.
It is notable that every circuit you have mentioned share the same ground connection, G200 near the right hand "A" pillar. They don't take a direct path to get there and pass through some splices and connectors. Make sure you are using a good ground connection for your test light.