Headlights and marker lights only work on one side.

[ShowroomShine]

Hooking up everything in my CJ5 , and find that only one side of the lights work. Neither right (from the drivers side) light works, marker or headlight. I have pulled everything and checked connections and ground (ground off the paint just to be sure). I also ran the ground to the frame just to isolate if it was the grill that had a bad light or not, nothing.

What gives?

EDIT: I hooked up a separate bulb and it worked, however I hooked up a second marker light/turn signal harness and bulb to my harness and it would not work. This was with the ground on and off.

 

[Jimbos76cj]

If one side works and not the other and your sure your grounded every thing well then it sounds like a bad wire either in the plug or where it splices together. When the put that harness together they splice the two sides together with a horrible solder joint and usually some duct tape. You can easily separate the lighting harness from the engine harness at the fuse block. I would pull the harness out, lay it on the ground or a sheet of ply wood and open it up to look for bad connections. I also ran a 12ga wire from my negative terminal to a ss stud the runs through both sides of the grill. My headlights are hooked right to that, but it also grounds the rest of my lights up there a whole lot better. If neither of the sides worked I'd say check the switch.