A common failure on this year is the TIPM module, it is the smart fuse box and controls most of the electronics in the car. Each turn signal lamp is an individual output from the TIPM. If the other turn signals all work you can eliminate everything except the TIPM, bulb and it's ground wire.
In your case I would start at the lamp in question. Verify the lamp is good, then use a test light connected to ground and, with the turn signal on check to see if one of the terminals shows battery voltage pulsing on and off. If it has that then the issue is likely a ground. The ground wires for the turn signals are all black wires with a colored stripe depending on which corner. To test those you would connect the test light to battery power and then probe the ground terminal in the socket. If it lights then the circuit should be good.
The diagram is cropped a bit to show just the relative circuits and ground colors. If you trace the output for the signal in question back to the TIPM and find no output on it, the repair is to replace the TIPM and have it initialized if it is a used or rebuilt module.
Monday, November 2nd, 2020 AT 11:22 AM