Troubleshooting Passenger Side Turn Signals/Brake Lights That Don't Work After Installing Diode Kit
Published 07/25/2023
Products Featured in This Question
Question:
Hello, I recently had a diode, link of part listed below, installed for my 2022 Jeep Wrangler. When I hooked up the RV and did a safety check the driver brake light and turn signal worked fine. However, the passenger taillight turn signal and brake light did not work. However, when I put on the emergency flashers on the RV both taillights worked/flashed. I have attached a picture of the passenger connection. I am thinking either its not wired correctly near the tailight or maybe the Flexo-Coil cord needs to be replaced. Please help! Thank you!
asked by: Matt H
Expert Reply:
After checking out our install video on a 2021 Jeep Wrangler the only thing it seems to me like it could be is the wires on your passenger side may be incorrectly hooked up.
The easiest way to check this is to remove the OEM wiring from the diode and check the functions of your taillight with a circuit tester # PTW2993. You are going to need to replace the spade connectors with # RM-300115-00 since you'll need to cut off the existing ones to crimp the wires.
If the wiring is correct, then the issue is going to be with the diode itself. Since you said it was recently installed I'd then reach out to Roadmaster and have them replace it since their part was faulty.
But in all honesty, I'd take your car back to whoever installed this kit and let them know what's going on. If you installed it yourself then you can proceed with checking the wiring, but if not I would 100 percent take it back.
(click to enlarge)
Product Page this Question was Asked From
Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 4-Way Flat Connectors
- Flat Tow Wiring Harness
- Splices into Vehicle Wiring
- Diode Kit
- Universal Fit
- 4 Flat
- Roadmaster
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Vehicle Tow Bar Wiring
- Shop: Base Plate for Tow Bar
- Search Results: blue ox lock
- Shop: Trailer Wiring
- Search Results: accessories and parts
- Video: Setting Up Your Curt RVi Series 12-Volt Outlet Kit - 2025 Jeep Gladiator
- Search Results: diode kit
- Search Results: rm 154
- Search Results: tow bar locking pins
- Search Results: roadmaster tow bar
- Search Results: trailer hitch locks
- Video: Review of CURT RVi Series 12 Volt Outlet Kit RVibrake - RVI37FR
- Shop: Vehicle Tow Bar Brake System
- Video: An In-Depth Look at the Roadmaster Accessory Kit for Nighthawk and Sterling Tow Bars
- Video: Hands-On with the Roadmaster Tow Bar Cover
- Shop: Trailer Hitch
- Video: The Low-Down on the Roadmaster Tow Bar Adapter Bracketes for etrailer Base Plates
- Q&A: Will Curt RVi Shadow 2 Braking System Work To Flat Tow 2023 Ford Maverick?
- Q&A: How to Power Blue Ox Patriot Braking System When Vehicles Negative Battery Cable Is Unhooked
- Video: Comparison of the Demco and Roadmaster 12 Volt Outlet Kits
- Video: Installation: 12 Volt Outlet Kit, 20 amps on a 2013 Jeep Grand Cherokee
- Article: Diode Installation Instructions for a Dinghy with Separate Tail Light Wiring
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Shop: Roadmaster Universal Hy-Power Diode Wiring Kit
- Shop: Roadmaster Tow Bar Adapter Brackets for etrailer Base Plates
- Shop: etrailer Invisible Base Plate Kit - Removable Arms
- Shop: Roadmaster Accessory Kit for Nighthawk and Sterling Tow Bars - Tail Light Wiring - Lock Set
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Article: Trailer Wiring Diagrams
on Flat Tow Wiring Harness
