I am having an issue with my right taillight on my 2005 Silverado 2500 HD. The right turn signal flashes rapidly and dim. No brake light. No emergency flasher. No tail light light when head lights on and no emergency flasher. This comes and goes. I have replaced the flasher module. Does not fix. I have a new distribution module for the rear ordered. I have also read that it could be the wiring harness. Anything else that could cause this? Thanks

 

Check the taillight socket to make sure it makes a good connection to the bulb. Also check the bulb in the front right turn signal to make sure it works properly.

 

Solved. Replaced the flash module and taillight disribution block. No change so I guess I have extras now. Replaced the harness for the right taillight and it looks like thyat solved it. No rapid flashing an other lights look to work. Also had a blown fuse for the right trailer light wiring. If I didn't have to have a trailer for this weekend I probably would have started with the harness, but needed the parts just in case since you have to order everything online these days or get shafted by the dealer.