Reverse Lights Stay On After Installing Mopar Trailer Wiring Harness on 2012 Jeep Wrangler Unlimited
Question:
After installing factory Mopar 7 pin wiring harness , the reverse lights illuminate and will not extinguish. I have moved ground to different locations but it does not matter. As soon as the wire harness is connected to positive battery post, the reverse lights illuminate.
asked by: Kevin C
Expert Reply:
It sounds like the center post on your 7-Way is set up for auxiliary 12 volt power rather than reverse lights on your 2012 Jeep Wrangler Unlimited. You can remove the wire to the center terminal on the 7-Way and splice it into a reverse light wire behind one of the tail lights.
Is this happening on a trailer you are towing or the Jeep itself? If it is on the Jeep then it sounds like there is a short that is jumping from the 12 volt circuit to the reverse light circuit and backfeeding somehow to the reverse lights on the vehicle.
On some Jeep vehicles a Jeep dealer has to reprogram the vehicle computer so that the wiring harness/trailer connector will work properly. While I haven't heard of that being an issue on a 2012 Wrangler Unlimited it is still a possibility.
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