Home Forums Gear Hunting Trucks and Four-Wheel Drives Trailer plug wires

Direct ground from battery to engine is for the starter. It uses the most power of all electrical items. If all lights are grounded good to the trailer, a ground through the plug, and a good ground from plug to vehicle frame, you are 90% there. Most often ignored problem areas are in the back of the plugs themselves. Solder the ends of the wires, put them into clean sockets, and pack with dielectric grease.

And NEVER use those damned crimp on scotch lock splices.