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The other day I went under the rear of the truck and noticed a green wire with a scotch clip attached and two wires that went no where. I tried to contact the previous owner of the truck to see if he had hooked anything up back there but I could not get a hold of him right away. Here is a picture of the wire. Picasa Web Albums - Tom - Truck
I also rolled under my pops 2010 f250 just to see if there was a wire there and there was but it was taped back and heat shruck on the tip. Im guess that the wire is a tap for power??
Just curious to see what this wire could be.
And a side note to all of this, I also tried to hook up my buddies trailer to the truck and noticed that the lights would kick out then come back on and do that until I unplugged them. The plug going into the truck was also screamin hot. That sounds like a bad ground to me on the trailer but I figured I would add this since Im not sure if the wire under the truck has anything to do with the trailer lights.
I was under my new truck bed last week. The lone heat shrunk wire is indeed the center high stop light for a cap. Beside the tape holding it back should be a label. The label was beatup but still readable. I just got my truck back from the body shop and realized my backup lights are coming on when I step on the brakes. I have to move the pins around in the OEM harness.