Troubleshooting Tail Lights Not Working While Flat Towing 2020 Jeep Gladiator

Updated 10/13/2022 | Published 10/08/2022

Question:

I have a 2020 Jeep Gladiator as my toad. I plug my jeep into 2 another vehicles and all the lights work. I plug my jeep into my rv to tow it and all I have is turn signals and brake lights. No taillights. My rv is a 2016 Coachman Concord 300ds. What can I look for on my rv thats wrong. Thank you for your help.

asked by: Ron M

Expert Reply:

Since it sounds like the lights on your 2020 Jeep Gladiator work when hooked up to other RV's the problem must be on the 2016 Coachmen Concord 300DS. The first thing I would do is check your connector at the back of the RV. Make sure it is free of any dirt or corrosion and clean as necessary.

Once that is done, I would check the ground connection. Make sure it is secure on a clean, bare-metal surface. If all of this checks out then it is time to test the connection. Using a circuit tester like the # PTW2993 go ahead and check the tail light pin on your connector.

Based on what you have said you won't have any power at the connector but it doesn't hurt to check. After that, I would check right behind the connector. It is possible the wire pulled loose from the back. If there is no power there, work your way back testing as you go. I would inspect the wiring at the same time since there is likely a short, repair the wire as necessary.

expert reply by: Robin H