Wiper Motor: Testing and Inspection

There are two ways to test the wiper motor. The first way is to set a power supply and resistance framework as shown in the illustration. This set of voltages and resistances when applied to the different pins of the motor will cause the motor to run in its operating modes.

The second way to test the motor is by using J 34660-A. Windshield wiper test J 34660-A is set up to duplicate the parameters shown. By plugging the proper adapter into the motor, all of the modes of the wiper motor operation can be checked.

After choosing one of the above methods, test the motor. If a problem with the motor is discovered, replace the circuit board with a known good board. If the motor does not operate properly, repair or replace the motor.

For more testing procedures, refer to Diagnostic Charts and/or Symptom Charts. Testing and Inspection