Headlights - DRL - Cluster Lights - Interior Lights

Tiny
CODYDFEDRIC
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • 177,000 MILES
My headlights would not turn on the other day. I have done some checking on my Tahoe and this is what else I have found.

No headlights.
No DTRL
No Interior Dome Lights (But do have working marker lights on doors)
No Cluster Lights
No AC back illumination. (Do have radio illumination and it will dim with the switch)
No fog lights
If I leave the Tahoe alone and go start it the headlights and all of the above will come on for 2-3 seconds then go off.
I can also open any door and the dome lights come on for 2-3 seconds then go off and will not come back on.

Somehow I ran into this - While the headlights are working, the dimmer switch will make the cluster etc dim but also dims my headlights and the relay for the headlights in the fuse box under the hood makes a electrical humming noise the dimmer I go.

Have checked -
All fuses good, do not know how to check the relay fuses, we did try new ones and it was the same result.
Battery is good
Alternator is good

Thank you for any help with this problem.
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Friday, July 5th, 2013 AT 12:14 PM

1 Reply

Tiny
DOCFIXIT
  • EXPERT
Suspect a wacked out Body Control Module
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Friday, July 5th, 2013 AT 12:17 PM

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