Trailer Left Side Running Lights Not Working All Other Lights Work
Question:
I have the trailer lights wired through a conjunction box to a WesBarg 7-Way, RV-Style Connector w/ 6foot Long Coiled Cable - Trailer End - WG54006-043. the turn and brake lights work. the right side running lights work but not the left.
asked by: Kevin
Expert Reply:
On many trailers the running light wires are jumped from one side to the other on the trailer. This is because there is a single running light wire only ran on one side. A wire would have to be spliced in on the one side, ran to the other side of the trailer, and connected to the running lights.
If using a junction box, the one running light wire from the trailer connector can go to a single terminal and from there you can run separate wires for the running lights on each side of the trailer. So first make sure that there is a wire for the left side running lights.
Another possible cause is a ground issue. Make sure all of the lights are grounded to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. Running jumper wires from the light grounds to the main trailer connector ground can help.
And finally, if the trailer has a lot of running lights then they could be drawing more power than the system can handle. To test that you can disconnect some of the working lights and see if any of the other lights start working. If so then to draw less power you could switch all the lights to LEDs.
Product Page this Question was Asked From
Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens
- Trailer Lights
- Tail Lights
- Stop/Turn/Tail
- Oval
- Surface Mount
- Submersible Lights
- LED Light
- 6-1/2L x 2W Inch
- Red
- Optronics
more information >
Continue Researching
- Q&A: Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
- Q&A: Troubleshooting Trailer Lighting Where Only One Running Light Works
- Article: Trailer Wiring Diagrams
- Q&A: Replacement Clearance Lights ATC Aluminum Trailer
- Video: Review of Universal Group Trailer Leaf Spring Suspension - Springs - SP-230275
- Shop: Optronics ThinLine LED Trailer Tail LIght - Stop, Turn, Tail - Submersible - 11 Diodes - Clear Lens
- Shop: Thinline LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 11 Diodes - Clear Lens
- Q&A: Troubleshooting No Running Lights on Trailer but Turn Signals and Brake Lights Work
- Article: Wiring Trailer Lights with a 5-Way Plug (It's Easier Than You Think)
- Search Results: trailer door latch
- Shop: Optronics LED Mini Clearance or Side Marker Trailer Light - Submersible - 2 Diodes - Amber Lens
- Shop: LED Trailer Clearance or Side Marker Light with Chrome Bezel - 2 Diodes - Red Lens
- Shop: LED Trailer Mini Clearance or Side Marker Light - Submersible - 2 Diodes - Amber LEDs - Clear Lens
- Shop: Optronics Thinline LED Utility Light Bar - Submersible - 11 Diodes - Clear Lens - 15" Long
- Shop: InfiniteRule Hitch Lock for 3" Hitches - 3-5/8" Span - Stainless Steel
- Search Results: 26 inch leaf springs
- Search Results: mcl131ac210b
- Search Results: mcl131rc210b
- Q&A: Replacement 25" Slipper Spring Needed for 3,500 lb Axle
- Q&A: Replacing Slipper Springs with Double-Eye Springs
- Q&A: Trailer Lights Left Side Turn Signal and Brake Lights Not Working
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Search Results: clearance light guard
- Video: Trailer Wiring Harness Installation A35W42B
- Search Results: wesbar side marker light
- Shop: RV Furniture
- Shop: RV Mattress
- Shop: RV Roof Membrane
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Shop: Brake Controller