Troubleshooting Running Light Circuit Not Functioning After Curt Harness # 56200 Install

Updated 05/26/2015 | Published 05/23/2015

Question:

Hey how you doing, I have a problem with unit 56200, after I was done connecting all the cables and tested them everything working in order, then night time came I plug the trailer so that when I figured that I wasnt getting tail running lights, the brakes and turns signal work fine but no running lights, can you explain me if the unit is defected cuz we even tried to plug it differently and still the same I also pluged it into another cable and was getting the running lights but then I was getting the bake light, what can I do in this situacion thanks.

asked by: Alberto

Expert Reply:

It sounds like you have one of two things going wrong on your trailer wiring setup. Either you aren't using the correct circuits when you wired up the Curt Harness part # C59236, or the trailer you are towing has weak grounds and can't handle the load of every circuit being activated.

First check to make sure that all of the connections you made on your tow vehicle to install the # 56200 are made to the correct circuits. Specifically the red wire of the converter with the brown stripe. That needs to be connected to the stop light/running light circuit.

Inspect the connectors on the trailer and the vehicle for corrosion and repair or replace as necessary. Next, check the ground connections on the trailer. A poor ground could cause the lights to malfunction. Be sure to check the main trailer ground and the grounds for each light assembly if they are accessible. If possible, it is best to route all of the ground wires back to the main trailer ground, but this may be difficult if the wires are hidden behind wall panels on your camper. If the wires are not accessible and you aren't comfortable removing wall panels, I recommend taking your trailer to a trailer shop.

expert reply by: Jameson C