Select Your Vehicle

View Cart

Trailer Side Marker Lights Not Working


just installed the wiring kit and all of the lites work except the side marker lites...I have them connected to the brown wire. Just the brown going to black wire that is coming from the side marker lite.

asked by: Pete

Expert Reply:

It sounds like you do not have the side marker lights properly grounded. If the lights have a separate ground wire to attach to the trailer frame it will need to be connected to a suitable point on the trailer frame. The closer to the light the better.

If you light does not have a separate ground wire then it is grounded through the mounting holes and you will need to be sure that the light is mounted directly to the trailer frame and making a good connection.

Use a circuit tester, item # 3808 if you need one, to check the wires and lights to be sure the ground is securely connected and you have power.

expert reply by: Bob G

Robert G

Have a question for the experts? click here.

Products Referenced in This Question

Quickee Circuit Tester

Quickee Circuit Tester

4 reviews




Product Summary:

Tools for Wiring


Circuit Tester

more information        

Product Page this Question was Asked From

Submersible, Under 80" LED Trailer Light Kit with 25' Wiring Harness

Submersible, Under 80" LED Trailer Light Kit with 25' Wiring Harness

95 reviews



Product Summary:

Tail Lights

Side Reflector
Rear Reflector
License Plate



Surface Mount

Product Specs:

LED Light

Submersible Lights

5-1/4L x 5W Inch

more information        

More Answers about Trailer Lights

Featured Help Information

Recently Viewed Products

Stay Connected

Subscribe to email newsletter


privacy - we don't send unsolicited email reviews

All images, layout and content copyright