Rear Wiper Motor

REAR WIPER MOTOR

CAUTION:
- The magnets in the windscreen washer motor can become damaged if the motor is jarred.
- The ammeter must have a range of at least 10 amps DC in order to not damage the meter.

NOTE: Use an external 12V DC supply which can be loaded to at least 10 amps, or use fused battery voltage.

Measure the power drained by the rear wiper motor.







1. Turn off the ignition.
2. Remove the component multiplug.
3. Connect the negative terminal of the ammeter to pin 2 of the rear wiper motor. Connect the voltage supply negative to the rear wiper motor housing.
4. Connect the voltage supply positive to the positive terminal of the ammeter and switch on the voltage supply. Read the current on the meter as the rear wiper motor runs. The reading should be about 2 amps.
5. Turn off the voltage supply and remove all test connections.

Check limit switch.







NOTE: The rear wiper motor must not be at the rest position.

Connect the voltage supply negative to the rear wiper motor housing. Connect the voltage supply positive to pin 1 of the rear wiper motor and switch on the voltage supply. The motor must run and stop in the rest position. If it does, the motor is OK. If not, install a new rear wiper motor. Refer to Rear Window Wiper Motor. Rear Window Wiper Motor







1. Check break contact.
Measure the resistance between pin 3 and 4.
Is the resistance less than 1 ohm?
If yes, go to Step 2.
If no, install a new relay.







2. Check make contact.
Measure the resistance between pin 3 and pin 5.
Is the resistance greater than 10 kohm?
If yes, go to Step 3.
If no, install a new relay.







3. Check relay contact in activated condition.
Connect the positive terminal of the power supply with pin 1.
Connect the negative terminal of the power supply with pin 2.
Measure the resistance between pin 3 and pin 5.
Does the relay switch click and is the resistance less than 1 ohm?
If yes, the relay is OK.
If no, install a new relay.