So to start from the beginning, my reverse lights were not working a while back, easiest way for me to fix was to wire a jumper wire from trailering harness back up wire to my reverse lights, problem solved. SO last week i noticed my reverse lights not working again, then noticed my the outlet where u plug trailer lights in was cracked and bent, I changed the trailer harness at the back of the truck where u would plug your trailer lights in because during snow someone backed in to a snow bank which cracked it, so i figured maybe this somehow killed the reverse lights, changed it, and nothing. Check fuses, blown trailer reverse fuse. Changed that and reverse lights were on constantly. I then changed the relay for that and i thought problem solved cuz the light went off. 2 days later i look outside and my dome light is going on and off, reverse lights are doing the same, the light on the back of the cab when u open the door also coming on and off. go outside and my radio is also on, going on and off. I had been hearing some clicking noise driving coming from around the fuse box, dont know what it is, still heard it when lights were going in and out, no key in the ignition. I also noticed even when the radio and dome lights were not on, the lights on my door lock button and power window button were staying on constantly, any thoughts? Im lost, dont wanna just start replacing relays, the little 1 for the back up cost me almost 15.00, has 6.0 engine

 

2003 trucks with a build date of 9-29-03 through 12-01-03 have issues with wire chaffing under steering column, Did you check there?

 

no, I drove the truck today, I didn't hear the clicking, which I'm guessing is some sort of relay but I will look into the wire chaffing, thanks