[xcquadracer]

Ok, i am having intermittent trouble with my reverse lights. Only 1 is working. However it alternates from left to right. One time the left works sometimes the right works. I thought it might be bulbs so i replaced both. No corrosion on the left one, corroded bad on the right. So i fid my best to clean the sockets(which suck and are loose fitting bulb sockets.) And now it still does it. Its not a fuse because it works sometimes and its not the switch because at least 1 comes on. Sometimes both come on all depends really.

Help!

 

[Smccarty3]

You may have to do some troubleshooting to narrow down the issue. First I would see if the side with the good socket works consistently without the other plugged in. I am thinking it's the socket or maybe a short in the harness. I have a couple replacement taillight harnesses. I could sell you one if you figure out that is the issue.

 

[xcquadracer]

I do live in Upper Michigan and we do have salt issues in the winter. I noticed it works more when i wash the truck so maybe it is a harness issue. The corroded one isnt working this morning so ill hit it with a meter today and see if im getting voltage to the socket. It might be a weatherpak connector for the light. The alternating is what is strange.

 

[titan14]

Im trying to attach the wiring schematic to this thread, but i don't know how. If it had a short, it would blow a fuse. Follow the harness closely and check for any loose connections/wires or burn damage from exhaust gas leak

 

[Smccarty3]

While I agree with checking the harness, especially above the muffler output. I do not agree with a short necessarily blowing a fuse. I've seen several instances where shorts didn't necessarily cause the fuses to blow. This is one of the reasons battery drain issues are hard to isolate. If anything I think it might be a ground issue. If you have a multimeter able to measure continuity (ohms), you can check the negative contacts in the socket with the frame.