As we subject our trailers to the abuse of highways and travel, we should expect some problems and issues. But one that I had not expected came from the original installation of the cellular telephone extender external antenna, mounted on the top, rear, street side of the trailer.
When I would plug in the trailer electrical connection to my truck, the running lights fuse in the truck would blow. I figured the plug had a problem, so changed the plug. Still the same problem. Let it set for a few weeks, for various reasons, and it worked fine. The problem was everytime the fuse blew, it was $6 for a new fuse. And I didn't know when/why the fuse was blowing. So, I took it on the road, and eventually, about 2 days out, the fuse blew again. I just didn't drive at night or in the rain. When I got home, I took it to the trailer repair store - Conejo Vacation Trailers in Thousand Oaks, CA. Mike had the trailer for 6 days and figured out that one of the screws from the antenna mounting had made its way to the running lights wire insulation, and caused a short. It had punctured the insulation enough to cause the short.
A green wire provides power to the running light/marker lights/tail lights. He was able to trace the green wire and through elimination, figured out the problem. He removed the screws from the antenna mount, glued the antenna mount onto the trailer and filled the mounting holes, and no more intermittent problem. I have been on the road for 3 weeks now without a blown fuse.
I only mention this in the case that someone else has a similar problem. Oliver service had not heard of a similar problem. Mike, from Conejo Trailer, spent time on the phone with the Oliver service people, who were helpful in helping him to trace down the problem. (something else that should never have happened, as my drawer fell out again today. Tired of having to use duct tape to hold the drawer closed.)