Grounds for Tail Lights and Marker Lights

It doesn't matter how many grounds you have and you can use the entire frame wherever you need one. I always have at least one ground in the back and another in the front for the tow lighting.

For instance, you can run the rear clearance light grounds to the tail location. Then connect both grounds and run one wire either to the other tail light (and down) or run each side ground down to a central rear ground bolt. It's really a matter of what works for you and the trailer.

I like to put another J box in the back to make repairs easy if need be. I run a ground from that box to the frame. My 52 Hanson has 5 grounds: front, rear and 3 from the skins to frame. A ground is a ground is a ground and the more the merrier, in my opinion.