Introduction

Trailer lights out? Here's how to diagnose and fix trailer lights that are dim or don't work. Most fixes are quick and easy.

Keep your trailer light wiring in tiptop condition

If your utility trailer is starting to show its age, you no doubt have had problems with your lights. Properly functioning trailer lights are a must for safety, so check your lights every time you use your trailer. Some problems, such as a burned-out bulb or a bad trailer light ground wire, can be a snap to fix—others can be a real pain to diagnose and repair. Follow the steps in our photo sequence to keep your trailer lights in tiptop condition.