I have replaced the multifunction switch, the flasher relay and all the right side lamps. Everything worked good for 2 weeks and then the right side fuse blows again when signaling a right turn. I am totally without thoughts of how to chase down the problem. I went to JustAnswer and was told to replace the multifunction switch which did not solve the problem. This is an 01 Chevy C3500, very clean, no off roading, never damaged, all under body wiring appears undamaged, with 104,000 miles. Anyone have the wiring routing for this truck? There is a fuse terminal on the inside drivers side that has a 20amp fuse that blows. The other fuse terminal under the hood on the driver side has 10amp fuses for the left and right sides. These have never blown, only the 20amp inside the drivers door. I have disconnected the lamp socket and isolated the wiring thinking the problem was in the socket. That did not "solve" the problem. With the socket wires disconnected the flasher would click really fast, as if a lamp was out, then blow the 20amp fuse. I think I could trace the wiring to see if there was a rub or grounded dark blue wire for the right turn signal if I knew where the wiring runs from the relay and how it goes thru the body to get to the various right side lamps. I have tried chasing it form the rear forward and get only so far and then things get really bunched up and I am not sure what to pull apart to look. ANY suggestions or ideas or experiences with this type problem? I would sure appreciate any help or thoughts out there.