Postby marvmmarv » Fri Sep 25, 2009 8:34 pm
The turn signal is shorted to the brake lights system somewhere. I would start at the bulbs because that's the easiest to reach. Remove the right side turn signal and brake light bulbs, one at a time and check to see if the problem is fixed. If that's not it, the problem is probably in the wiring or one of the switches. Have you done anything with the trailer wiring recently? That could do it too. Specifically, check the ground wires at the bulbs.