This is the primary cause of trailer-light problems. Symptoms include flickering, fast-blinking, dimness, intermittent operation (often when a trailer ball is used for a ground), and complete failure.

With fishing seasons nearing, now is the time to give some thought to the most common problems related to boat trailers: lights and wheel bearings. LIGHTS: The most common headache with boat trailers ...

At the launch ramp or around the campfire, boater talk often turns to troubles—and topping the discussion, along with outboards and tow vehicles, is the boat ...