Dome light.

[Ray1988r20]

Okay, so my dome light wasn't working, nor was my cargo light. Traced down the wires, one was broken under the floor carpet. Now, my dome light won't go off. It gets dim when you shut the door, and when the switch isn't on. Ground problems? Can't seem to chase it down. 1988 R20. Any help or suggestions would be GREAT!

 

[Georgeb]

The white wire is the ground wire and the orange is constantly hot positive. Both the light switch and the door jamb contacts complete the ground side of the circuit to turn the dome lamp on or off. You may have a short or partial short to ground in the white wire.

 

[Ray1988r20]

I have checked that, it seems like it's good, couldn't see anywhere it was shooting out. I'll look at it again, and I'm gonna try to move my ground strap for the cab, thinking maybe over the years it has lost good contact maybe.

 

[Georgeb]

Once upon a time I had an issue where a poor trailer wiring ground caused a back feed through the dome lamp. I would have to look at a wiring diagram to find the path it took.

 

[Ray1988r20]

Well, now that you mention that, I did have to remove a damn rats nest of wires, wire nuts, and black tape **** from the rear. Looked like a damn spaghetti factory under there. This was a rescue to say the least. Maybe I missed something under there..... I'll have to revisit that...