Harness Needed To Install Trailer Tail Lights On Flat-Bed GMC/Chevy Truck

Question:

i bought led lights oval stop,turn,running. three wire. I also bought seperate oval backup lights. they are being installed in my new flat bed that is on my truck. My 2005 gmc sierra 3500 is a cab and chasis it has. ground,brake,left turn,right turn, backup marker,stop. what do i need to wire them up. thanks

asked by: Stephane R

Expert Reply:

If you are trying to install trailer tail lights on a pickup then you'll need a converter box since the pickup uses separate signals and the trailer lights are combined. I recommend the Hopkins Tail Light Converter part # HM48847. I can't tell you exactly how to wire the lights as I don't know which exact ones you have nor do we have any wiring diagrams for the vehicle so you will simply need to match the wires up by function (not color) which is done by checking with a circuit tester.

expert reply by: Conner L