Right Side Trailer Lights Do Not Work, Grounds are Clean
Question:
I have cleaned the grounds on the both tail lights ,the right side light will not work at all.
asked by: Philip B
Expert Reply:
There are a few things you can check. First, disconnect the trailer and use a circuit tester like # PTW2993 if needed to test the trailer connector just to make sure everything is working fine. If the left side lights are working, chances are the problem is not on the vehicle.
But if you do find an issue on the vehicle side then it could be a relay or fuse (consult owner's manual for locations) or a bad ground in the wiring harness.
On a lot of trailers, there is a jumper wire from one side of the trailer to the other side for the running lights. Trace the wiring back and make sure that connection is made and that there are no broken or exposed wires touching bare metal.
If you recently added a plastic license plate, this can cause a bad ground connection. Make sure to check the trailer side and vehicle side connectors for any dirt and corrosion and clean them out. Make sure the main ground is attached to a clean metal surface.
If you have a large number of lights on the trailer, it is possible that the power draw is too much for the wiring harness and that would cause some lights not to work.
Products Referenced in This Question
Product Page this Question was Asked From
Piranha Slim-Line LED Mini Clearance or Side Marker Light - Submersible - 2 Diodes - Amber Lens
- Trailer Lights
- Clearance Lights
- Rear Clearance
- Oval
- Surface Mount
- Submersible Lights
- LED Light
- 2-5/8L x 3/4W Inch
- Amber
- Peterson
more information >
Continue Researching
- Shop: Vehicle Tow Bar Wiring
- Video: Optronics Trailer Lights - Clearance Lights - MCL22RK3B Review
- Shop: Trailer Wiring
- Q&A: Recommended Easiest Way to Isolate Brake Signal for High Mounted Third Brake Light
- Q&A: How To Wire Dome and Third Brake Light On Leer Camper Shell
- Shop: Optronics LED Mini Clearance or Side Marker Trailer Light - Submersible - 2 Diodes - Red Lens
- Shop: Identification Light Kit for Trailers over 80" Wide - Submersible - 3 LEDs - Red
- Shop: Optronics LED License Plate Light - Submersible - 1 Diode - Chrome Housing - Clear Lens
- Shop: CE Smith Trailer Wiring Clips - Frame Mount - Zinc Plated Steel - Qty 10
- Shop: Wire Frame Clip
- Q&A: Is Mini LED Identification Light Kit for Trailers Over 80" Wide For Running or Brake Lights
- Q&A: Where Does Red Wire go For Optronics Light MCL22RK3B
- Q&A: How To Correctly Wire The Optronics Thinline LED STL64RB To A Trailer
- Video: Optronics LED Trailer License Plate Light with Bracket Installation
- Video: Roadmaster Wiring - Trailer Connectors - RM-910030-4 Review
- Video: Spectro Wiring Steel Tubing Clamp Review
- Video: Optronics Trailer Lights - License Plate Lights - LPL56CB Review
- Video: Optronics LED Trailer License Plate Light Review
- Q&A: Wiring a Camper Shell Third Brake Light on a 2017 Chevrolet Silverado
- Q&A: Will Optronics Flush Mount Rubber Grommet A11GB Fit 1/4-Inch Thick Mounting Surface
- Video: Optronics Trailer Lights - Tail Lights - STL64RB Review
- Shop: LED Identification Light for Trailers Over 80" Wide - 3 Diode - Sealed - Rectangular - Red
- Shop: LED Trailer Fender Clearance Light - Submersible - 2 Diodes - Amber/Red - Driver or Passenger Side
- Article: What To Look For When Buying Ratchet Straps