MMcc
OBS Enthusiast
Hey All! I'm building out this '97 burb into an overlander. Hit my first frustrating roadblock - all the others have been "fun". (The truck is one-owner from Phoenix, bone stock & rust free).
Problem
Brake lights, rear turn signals, rear hazards, reverse lights --- they all just stopped working one day.
Attempted Fix
I've done all the easy stuff:
The truck has three trailer plugs hanging by the hitch. (what.the.hell??)
1) uHaul - all dead
2) damaged 4-pin w/o the plastic block - all dead. I think this one was OEM b/c it has a separate pigtail going to the non-functioning license plate lights (I'm not sure if the license plate lights ever worked).
3) another 4-pin. Two pins have voltage when the break or hazards are engaged!!
So there IS power getting from the front to the back.
The other clue may be a red herring. Two of the wires on the multifunction switch were a little melted at the connector. I've bought the replacement from 1aAuto and hopefully they can help me out with some info on what wires those are.
I'm desperate for direction. Without it, I'm thinking of exposing as much of this wire harness as possible, looking for damage. And if it comes to it, splicing in a chuck of junk-yard harness.
Problem
Brake lights, rear turn signals, rear hazards, reverse lights --- they all just stopped working one day.
Attempted Fix
I've done all the easy stuff:
- fuses are all good and have power
- cleaned the ground drivers side rear (right at the bumper)
- read every related post on gmt400
- removed a tail light and looked for power at the plug. Nothing. But the ground here is a'okay.
- replaced the multifunction switch
The truck has three trailer plugs hanging by the hitch. (what.the.hell??)
1) uHaul - all dead
2) damaged 4-pin w/o the plastic block - all dead. I think this one was OEM b/c it has a separate pigtail going to the non-functioning license plate lights (I'm not sure if the license plate lights ever worked).
3) another 4-pin. Two pins have voltage when the break or hazards are engaged!!
So there IS power getting from the front to the back.
The other clue may be a red herring. Two of the wires on the multifunction switch were a little melted at the connector. I've bought the replacement from 1aAuto and hopefully they can help me out with some info on what wires those are.
I'm desperate for direction. Without it, I'm thinking of exposing as much of this wire harness as possible, looking for damage. And if it comes to it, splicing in a chuck of junk-yard harness.