Troubleshooting Tail Light Wiring Kit on 2014 Ford F-150

Updated 04/24/2018 | Published 04/21/2018

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Question:

Installed on a 2014 F-150 EcoBoost just like in the video. Lights on truck work fine when not connected to the Motor Home with the loom installed. I have power coming from my motor home but nothing working on the truck. I powered the individual wires at the plug and still no lights of any kind at the rear of the truck. I connected my test light on the + battery side and connect to my trailer white ground and it lights up, so I know I have a good ground. Any other ideas of what could be wrong. I bought this awhile ago and just installed it as my Motor Home was in the body shop. I also tested it connecting to my son F-350 truck with the same results.

asked by: Mike K

Helpful Expert Reply:

Since you know you have a good ground what you need to do is use a circuit tester such as # PTW2993 and test harness # HM56000 individually for function when not connected to your truck. Doing this will let you know if there is an issue with the converter or not; if there is an issue then you have a faulty converter and you will need a replacement. This is uncommon but happens on rare occasion.

expert reply by: Kyle S