2007 Suburban - no reverse lights but trailer plug reverse and dome light work

[RobMax]

Done a fair bit of research to determine why the reverse lights are out on our Burb.

 

2007 LTZ with a few peculiar electrical issues - I am guessing this is just another to add to the list.

 

- Checked bulbs, fine, no power at connector in tail light but ground in socket seems fine

- Trailer plug has reverse lights working (verified with plug-in 7-way tester) - this to me means that the switch on tranny is good?

- Dome light works (so not the fuse by driver knee)

- other lights in the tail light work fine

 

Other issues that may or not be related:

- backup camera is black on display (stock) 

- no license plate lights

- rear auto level doesn't work unless you jump relay under hood then it works fine (new shocks and compressor/dryer)

- recently had to supply a ground connection to coil packs on driver side

 

Any direction appreciated.

 

[davester]

Dome light works when?  When the door is open&/closed/ignition key is turned, or when pushing the button by the dome light?

[tlaw91]

All those things share ground G102, left side of engine block forward of the motor mount


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[tlaw91]

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