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Hunting Down Those Electrical Gremlins


Articles / October 20, 2015

When the lights on your trailer won’t work properly, that trailer is a liability. Unfortunately, trailer wiring repair can either be a easy fix or a difficult one, and knowing our customers like we do, you’ve tried all of the easy tricks before contacting Ainsworth Trailer Repair of Denver to hunt down that electrical gremlin.

If It’s Not The Bulbs Or Plugs, Now What?

Well, it could still be the plugs anyway. The entire wiring system of your trailer lives a pretty hard and exposed life compared to the wiring system of the typical tow vehicle. That said, the hunt for your problem begins with thorough electrical testing of your tow vehicle’s electrical supply system with a 12V circuit tester.ains

By quickly eliminating an electrical fault, a blown fuse, a loose or missing electrical supply connection, a converter problem, or a faulty plug on the tow vehicle side, we can eliminate the intended tow vehicle as the source of the problem apparent in the trailer’s own wiring system.

Common Electrical Faults on Trailers

Once the tow side vehicle is ruled out, the signs of failure become clues to what is going on in the trailer’s electrical system. If none of the trailer lights work, Ainsworth Trailer Repair of Denver can look for a faulty harness hook up, frayed or severed wiring, a relay failure, circuit overloading, or an insufficient ground problem.

If one function works, such as the brake lights, but not another, such as the turn signals, again it could be a faulty relay, insufficiently seated connectors, a short circuit, or a grounding problem.

Sometimes, there are seemingly impossible problems, such as LED running lights on the trailer continuing to stay on though the tow vehicle is completely powered down. This could indicate a stray voltage problem in the wiring harness or a current “leak” from a cracked or partly molten harness allowing an unintentionally completed circuit which passively draws current from the tow vehicle’s battery.

We Have The Needed Expertise

No matter how tricky your electrical problem appears to be, our 115 years of combined trailer repair experience means that we’ve probably seen the same problem in another trailer and we know how to fix it.

Conveniently reached from either I-25 or I-70 E, Ainsworth Trailer Repair offers free quotes on every size trailer and repair job.