2006 Dodge Ram 2500 lighting problems

Truck was purchased used with 16000 miles. At approx. 20000 miles, an anomaly with the turn signal occurred: a "left" turn input resulted in a "right" turn output to the signals (assumed front and rear). This was initially unnoticed by the driver, as traffic conditions were dense. Upon beginning the left hand lane change, a check of the left mirror revealed a car overtaking on the left. Upon review of the turn signal, it was observed that left and right turn functions were reversed.

Tl* the contact owns a 2006 dodge 2500 mega cab. The contact stated the front left and right turn signals failed to illuminate on the outside of the vehicle. The vehicle was not taken to the dealer and the manufacturer was not contacted. The vehicle was not repaired, and the VIN was unknown. The failure and current mileages was 109,300.