Help: Parking lights stuck on

15278 Views 14 Replies 7 Participants Last post by Steve83, May 2, 2018

Crash_AF

Discussion Starter · May 4, 2006

I need help... the parking lights on my '95 are stuck on. I pulled the #4 fuse and pulled out the headlight switch and they're still on... does anyone have any suggestions on where I should look for the short?

Thanks,
Joe

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Crash_AF

Discussion Starter · #3 · May 4, 2006

Yes, completely removed the switch from the truck... LOL /ubbthreads/images/graemlins/rolleyes.gif

I also tried searching, but couldn't find anything.

After another half hour of troubleshooting I found the problem, it ended up being the trailer light relay (number 4 in the underhood box) stuck closed and backfeeding the truck's lights. Pulled the relay and all is well.

Later,
Joe

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Crash_AF

Discussion Starter · #4 · May 4, 2006

Ok, spoke too soon... parking lights are off, but the relay isn't the problem.

Swapped the relay with the one for the horn and it does the same thing.

Then I lost the stoplights/turn signals and the ABS light started flashing. Shut the truck down to come back in and the hazards (which I turned on while troubleshooting but weren't working) started working and now the stop/turn lights work fine...

I HATE electrical gremlins...

Any suggestions? /ubbthreads/images/graemlins/shrug.gif

Later,
Joe

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Crash_AF

Discussion Starter · #6 · May 5, 2006

Switch was fine, no melting at all. The wiring to the switch didn't look to have any damage either but I didn't dig deeper into the harness. Put everything back together and here's the symptoms currently:

Lights work fine with the trailer light relay out.
With trailer light relay in, turn on lights and once switched off, the parking lights stay on.
Pull the relay and they go off, put it back in and they stay off until the lights are turned on again. Switched relays and same symptoms.
Same symptoms with or without trailer connected.

Turn signal/ brake light/ABS light issue hasn't reoccurred.

Any other suggestions?

Later,
Joe

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Crash_AF

Discussion Starter · #8 · May 5, 2006

As long as the trailer relay is pulled out, the truck's lights work fine, no issues at all. It's only when the relay is in that the problem shows up. When the lights are stuck on and I unplug the headlight switch, they stay on. If I pull the parking light fuse in the underdash panel when they're stuck on they stay on. The only thing that shuts them off is pulling the trailer relay.

I'm assuming that there's a short somewhere that is keeping the relay energized and therefore backfeeding the truck's lights.

Next I'm going to disconnect the trailer connector and see if that changes anything.

Later,
Joe

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