one night i started smelling a burning plastic/electrical fume. noticed 2 seconds later that my dash lights werent on. when i hit the brake to pull over the dash lights turned on. let off the brake and they turned off. when i got out to check headlights and all, i noticed the tail lights weren't on either. when i hit the brake pedal though the brake lights turn on. also saw that the trailer electrical plug by hitch was all screwed up, like a short or something and it blew a whole right through it. wtf?

unplugged CTM and plugged back in - no luck.
took trailer plug off - no luck
checked fuses - no luck

smell is certainly coming from the cabin or front of truck.

anyone have similar issue?