Reverse Light Trailer Plug. Back up lights stay on when truck is off- most irritating. Installing Rigid Ignite, that only have a red and black cable, no.
If it is working, then you can simply move the red probe to the next slot in the plug and test each of the brake lights, blinkers, and reverse lights until you've eliminated any of. The addition of the Curt harness allows you to remove it or swap the harness if you mess it up. This Reverse Light System is brighter than any other LED replacement bulb we sell!
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No cutting or splicing vehicle wiring!
Trailer / Caravan Triangular Light Replacement Lamp with Plug Indespension. If it is working, then you can simply move the red probe to the next slot in the plug and test each of the brake lights, blinkers, and reverse lights until you've eliminated any of. OR splice the white and blue wires off of your existing trailer harness.