Tail Lights Blowing Fuses

[JMcCoy]

I have been blowing the incab fuse (15 amp) to the tail and corner lights (essentially the parking lights. Brake lights and directional are unaffected. It only blows while moving, so I assume it's a grounded wire that only contacts while moving. It doesn't matter if the parking lights are one or the headlights. I have replaced the headlight switch, disconnected the tag lights, and tugged on every wire I could reach. I welcome any recommendations, as this has been going on for a while. My next step is replace the fuse with a paperclip and see where the fire starts.

 

[BigPapa]

I think that circuit is also tied to your trailer wiring, but I'm not sure. If so, I had ONE STRAND of a wire in my trailer connector that had separated and was contacting another wire that caused me all kinds of trouble. I'd say check your trailer connector good.

 

[JMcCoy]

Thank you for your reply. I forgot to mention that I unplugged the trailer harness from the back of the receptacle. I will recheck the harness for chafed wires. Thank you.

 

[GAmes]

I had a similar issue once. I spent a couple days with the wire diagrams and a multimeter checking circuits. Mine was a splice buried in a wire harness under the hood. Once I identified the circuit I wired around it. No way was I going to unwrap the harness and dig for the wire.

 

[JMcCoy]

That's probably a good idea. If I can't find it soon, that's exactly what I will do. Thank you