Wiper Motor: Testing and Inspection

Fig. 14 Removing liftgate wiper motor cover. Omni & Horizon:

Fig. 15 Liftgate wiper system wiring circuit. Omni & Horizon:

Fig. 16 Testing liftgate wiper motor. Omni & Horizon:

DIAGNOSIS & TESTING

OMNI & HORIZON
1. Remove wiper motor plastic cover from lift gate, then disconnect feed wire connector from wiper motor.
2. Place ignition switch in the On position and check for battery voltage at blue wire.
3. With ignition switch and wiper switch in the On position, check for battery voltage at blue and brown wires.
4. If battery voltage is not obtained in steps 2 and 3, check circuit breaker, wiper switch and wiring.
5. If battery voltage is obtained in steps 2 and 3, apply 12 volts to terminal on switch plate without wire. If motor operates and drive shaft rotates, replace switch plate. If motor does not operate, replace motor assembly.
6. If motor operates but drive shaft does not rotate, remove wiper motor cover and inspect drive gear, drive shaft and drive link and repair as necessary.