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.
INTERMITTENT CONDITION
FRONT WIPER PARK SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
FRONT WIPER PARK SWITCH SENSE CIRCUIT OPEN
FRONT WIPER PARK SWITCH SENSE CIRCUIT SHORT TO GROUND
GROUND CIRCUIT OPEN
WIPER MOTOR
BODY CONTROL MODULE