Just had the tires balanced to fix a vibration that seems to increase with speed. It didn't fix the problem, though. Where should I be looking next?
All trailer connectors lost left turn and brake light. I followed the wiring to under the fuse box in the front of the truck. What is feeding that wire? the right side and marker lights work fine. I noticed that there seems to be two different systems truck and trailer package. The truck everything works fine it is just the left side of the factory trailer wiring.