I added a set of KC 517 Backup lights to help illuminate behind my truck. These are wired into my backup circuit, so I can clearly see behind me when in reverse. Initially, I wanted to use the trailer circuit for power, but the Ford Ranger trailer plug does not have a backup circuit in it. The only leads are taillights and left/right turn signal. I used the existing power from my bed outlet and wired the relay into my taillight backup light power lead
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