Lost Most of My Lights

[1987 GMC Jimmy]

So I don't have any turn signals (front or back), hazards (front or back), rear running lights, brake lights, marker lights, license plate light, or gauge lights. My turn signal relay clicks when I engage the stalk, but the hazard relay doesn't do anything. Checked relevant fuses, and the "STOP-HAZ" fuse was blown. It blows whenever I step on the brake pedal. I didn't have another spare to see if the hazards made it do the same. I noticed that when the headlight switch is cold, it'll make a pop or tick sound that's a little softer than a fuse blowing. The fuses that were blown were already blown whenever I noticed the noise. When it's been turned on before, and you turn them on again, it the headlight switch won't make that noise. Just to clarify, the lights that are working are the headlights, dome light, reverse lights, and the little blue high beam indicator. I also noticed that whenever I was playing with the turn signals, the arrow flashed once and quit during one of the several times I messed with it.

 

[Honky Kong jr]

So I don't have any turn signals (front or back), hazards (front or back), rear running lights, brake lights, marker lights, license plate light, or gauge lights. My turn signal relay clicks when I engage the stalk, but the hazard relay doesn't do anything. Checked relevant fuses, and the "STOP-HAZ" fuse was blown. It blows whenever I step on the brake pedal. I didn't have another spare to see if the hazards made it do the same. I noticed that when the headlight switch is cold, it'll make a pop or tick sound that's a little softer than a fuse blowing. The fuses that were blown were already blown whenever I noticed the noise. When it's been turned on before, and you turn them on again, it the headlight switch won't make that noise. Just to clarify, the lights that are working are the headlights, dome light, reverse lights, and the little blue high beam indicator. I also noticed that whenever I was playing with the turn signals, the arrow flashed once and quit during one of the several times I messed with it.

Sounds like you have a direct short to ground. Check your rear light harness. You were back there when you were doing your bumper.....you may have inadvertently pinched the harness.

 

[yevgenievich]

And see if there wires comng off fot a trailer plug that could short

 

[1987 GMC Jimmy]

Sounds like you have a direct short to ground. Check your rear light harness. You were back there when you were doing your bumper.....you may have inadvertently pinched the harness.

And see if there wires comng off fot a trailer plug that could short

I checked both. Visually, no wires were pinched, broken and rubbing, etc. on the frame, body, drop hitch, etc. I got a plastic clothes hangar, hooked the *** of wires, and pulled them around while the lights were on to see if they flickered and nothing.

 

[Cuba]

Maybe try unplugging the rear harness? Just to pinpoint where to focus.
I don't know if GMs have that like the Fords. You can unplug & replace the entire rear tag, brake, and parking light harness. It's even separate from the trailer harness just an add on on its own connector.

 

[Honky Kong jr]

Maybe try unplugging the rear harness? Just to pinpoint where to focus.
I don't know if GMs have that like the Fords. You can unplug & replace the entire rear tag, brake, and parking light harness. It's even separate from the trailer harness just an add on on its own connector.

Yes they do.

 

[1987 GMC Jimmy]

I'll give it a shot!

 

[1987 GMC Jimmy]

Got it! Pinched the brake light wires on the drop hitch. Oops.

 

[Honky Kong jr]

Got it! Pinched the brake light wires on the drop hitch. Oops.

Cool you found it.