2002 QC SLT 5.9

Not sure if its related but i recently had my motor swapped out, and a couple of weeks later the interior lights and power mirrors quit working. I've read a lot of the threads that talk about checking the fuses, which I've done, even the one in the special holder, and everything is OK. I cannot turn the lights on with the dimmer switch or by manually pushing them and they do not work when the doors are opened.

I pulled the C-codes from the cluster and am getting 27 & 29 which indicate courtesy/dome lamp output circuit shorted or open and Cargo lamp output circuit shorted or open.

I also noticed that on the headlight switch the illumination for the running lights and headlighs is not working, but it does for the fog lights. The other thing that I figured out that isn't working is that the overhead console average MPG resets everytime the truck gets shut off, but all the other functions work just fine.

My radio still works just fine, and I haven't noticed anything else that isn't working.

 

Still unable to correct issue.

 

Checked for a pinched wire. May have pinched one during the engine install. Did the trans come out too?

 

I don't know if this will help but I was watching U tube the other day and the guy was having trouble with his dome light +not coming on using the rear door. He removed the boot that comes from the body to the door and found a broken wire. You would have to look for the video I don't remember exactly where I was looking. Anyway it could be broken wires in your drivers side or passenger door shorting out the mirror control and dome light and maybe some other things, hope this may help. video