RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
The wiper module cannot be adjusted or repaired. If any component of the module is faulty or damaged, the entire wiper module unit must be
replaced.
The wiper module operation is controlled by the battery current inputs received by the wiper motor through the wiper ON/OFF and wiper high/low
relays. The wiper motor speed is controlled by current flow to either the low speed or the high speed set of brushes. The park switch is a single
pole, single throw, momentary switch within the wiper motor that is mechanically actuated by the wiper motor transmission components. The park
switch alternately opens and closes the wiper park switch sense circuit to ground, depending upon the position of the wipers on the glass. This
feature allows the motor to complete its current wipe cycle after the wiper system has been turned Off, and to park the wiper blades in the lowest
portion of the wipe pattern. The automatic resetting circuit breaker protects the motor from overloads. The wiper motor crank arm, the two wiper
linkage members, and the two wiper pivots mechanically convert the rotary output of the wiper motor to the back and forth wiping motion of the
wiper arms and blades on the glass.
