Few things prove more frustrating than troubleshooting trailer lights. It’s an axiom among trailer boaters that, once you fix an annoying problem, another one seems to crop up quickly, invariably the night before you head for the water. The cause is often corrosion of wires and connections. So if your trailer’s more than five years old and you can’t keep all of the lights working, it’s time to replace the wire harness. Let’s get started.
Skill Level: 2/5
Time to Complete: 4-5 hours
Quick Tip: Give pigtail wires a coiled look by wrapping them tightly around the shaft of a Phillips screwdriver and sliding the screwdriver away before connecting them to the main harness.