RAM 2500 Truck 4WD V8-5.9L VIN Z (1997)
Wiper Motor: Testing and Inspection
WARNING: ON VEHICLES EQUIPPED WITH AN AIRBAG, REFER TO PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING
STEERING WHEEL OR STEERING COLUMN COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER
PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
The following are wiper motor problems, tests to be performed to locate the faulty component, and the proper action to be taken. If the problem involves
only the delay mode, the wiper/washer (multi-function) switch, or the wire harness, see the diagnosis for Intermittent Wipe Module and Multi-Function
Switch.
Condition
The wiper motor will not run in any wiper/ washer switch position.
Procedure
1. Check the fuse in the fuseblock module. If OK, go to Step 3. If not OK, replace the faulty fuse and go to Step 2.
2. Check the wiper motor operation in all wiper/ washer switch positions. If not OK and the fuse blows, go to Step 5. If not OK and the fuse is OK,
go to Step 3.
3. Set the wiper/washer switch in the Low position and listen to the motor. If you cannot hear it running, go to Step 4. If the motor is running, check
the motor output shaft. If the output shaft is not turning, replace the faulty wiper module assembly. If it is turning, the crank arm is not connected
to the output shaft or the linkage is not properly connected. Replace the faulty wiper module assembly and/or properly secure the crank arm to the
motor output shaft.
Voltmeter Between Terminal L And Ground
4. Connect a voltmeter between the motor terminal L and the ground strap. If there is little or no voltage (less than 1 Volt), move the negative test
lead from the ground strap to the battery negative terminal. If an increase in voltage is noticed, the problem is a bad ground circuit. Make sure the
motor mounting is free of paint and that the mounting fasteners are tight. If there is still no indication of voltage, the problem is an open in the wire
harness or a faulty multi-function switch. If a small increase (greater than 3 Volts) in voltage is observed, replace the faulty wiper module
assembly.
5. Unplug the motor wire harness connector and replace the fuse. If the fuse does not blow, replace the faulty wiper module assembly If the fuse
blows, the multi-function switch or the wire harness is at fault.
Condition
The wiper motor runs slowly at all speeds.
Procedure