Wiper Motor: Testing and Inspection

DIAGNOSTIC PROCEDURES

The following procedures assume that the service technician has checked:

^ the continuity of circuit harness wiring.

^ that the wiper-motor assembly-to-dash mounting hardware is tight,

^ circuit fuses, and

^ that the washer hoses are clear, not kinked, disconnected or broken.






WIPER MOTOR

Check motor operation before removing wiper assembly from the car. Disconnect wiring harness from wiper assembly before performing the following checks:

Wiper On Car Check:

Testing Standard W/S Wiper-Washer Switch:

Testing Pulse W/S Wiper-Washer Switch:

Wiper-Washer Switch Check Chart:

1. Apply a (+) 12 volt DC (source) voltage to wiper connector pins as shown in (Wiper On-Car Check). If the motor runs in all operating modes (LO, HI; PARK & PULSE), perform the voltage and continuity wiper switch tests as shown in (Testing Standard W/S Wiper-Washer Switch), (Testing pulse W/S Wiper-Washer Switch) and (Wiper-Washer Switch Check Chart).

2. If the wiper motor does not run in any one or all of the operating modes, refer to Wiper and Washer Systems/Testing and Inspection.