I do have a couple of thoughts seeing that it's a new trailer... maybe one of the light fixtures has an internal short or maybe one of the wires got pinched or cut during assembly, but have my doubts that it's the trailer causing the problem.

With a new fuse in place, I can turn on the lights and everything works perfectly on the trailer... all the running lights, brake lights/directionals. It seems that it takes some time for the fuse to blow and is probably due to using the brakes and blinkers while in traffic.

A couple friends have told me to just switch the 10-amp fuse to a 15-amp and see what happens. I'm just concerned about burning something up in the 4Runner's wiring.

Any thoughts about that?

Thanks,
~Dave