
Posts: 32953
Location: Rhinelander, Wisconsin | Go to Fleet Farm or another 'like' store and get the little tester plug that plugs into your truck lights. If it works properly, and the LED lights on the plug do what they are supposed to, then the problem is in the trailer wiring. It takes a process of elimination to find the culprit on the trailer, but it is usually a bad ground, bad light bulb connections, blown bulbs or wiring that is shorted or broken. |