Possible Causes
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DTC'S PRESENT
TAILGATE SWITCH GROUND CIRCUIT OPEN
TAILGATE CYLINDER LOCK SWITCH MUX WIRE OPEN
TAILGATE CYLINDER LOCK SWITCH OPEN
BODY CONTROL MODULE - TAILGATE CYLINDER LOCK SWITCH OPEN