My new TT makes reverse lights stay on!

[Gifford]

The backup lights on my truck stay on whenever the lights are turned on with the trailer plugged in.



Is the trailer wired wrong? Or the Dodge ?











2006 Laramie QC SB

 

[APacitti]

My car trailer did this when i first got it. I assume you have a seven way plug? In my case the pins inside the trailer plug were contacting and the power feed for your trailer battery was contacting the back up light terminal. To fix it i pulled the plug apart and made sure the terminals were no longer touching and reassembled. Been fine ever since.



Hope this Helps



Alex

 

[JeffJackson]

On my trailer, the lights on the back are also the reverse lights for the trailer. That then ties to the reverse light on the truck when the plug is attached.

 

[surfbeetle]

On my trailer, the lights on the back are also the reverse lights for the trailer. That then ties to the reverse light on the truck when the plug is attached.

The center pin on the 7 way round plug is the reverse lights (yellow wire on the 7 wire conduit). When your running lights are on, the reverse lights must be getting power from that circuit because of a connection from the running lamp circuit to the reverse lamp circuit, most likely at the rear lamps themselves or at the wiring junction at the front of the trailer. Another way to test this would be to have someone shift your truck into reverse with the trailer plugged in and running lights off, see if the trailer's lights and your rear taillights come on.



You will have to see at what point the two separate circuits are connected on the trailer and separate them. You could just disconnect the yellow wire at the front of the trailer at the junction where the trailer harness meets the rest of the wiring.

 

[GWJCTD]

Mine did that too ,cause was two fuses under my hood! It was back feeding,now everything works perfect.