What is wrong with my truck? I can't figure out why I can't get any running lights on any trailer I hook up. Thought it was an issue in harness for trailer, replaced it, still doesn't work. Plug into my 5th wheel and the second the plug makes contact the fuse blows on the trailer for the running lights. Get hazards, signals and brake lights but, no running lights. Thought it was the 5th wheel, hooked up boat trailer and,,,no running lights. Works with the wife's Expedition. No blown fuses in my truck, new harness for rear and plug in bed for 5th wheel. All the lights on my truck work. Read some where that this could be a tell for ECU going bad? please help.
↧