Wiper and Washer Systems: Testing and Inspection

Low Speed:

INSPECT WIPER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead to terminal 1, check that the motor operates at low speed.
If operation is not as specified, replace the motor

High Speed:

INSPECT WIPER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, check that the motor operates at high speed.
If operation is not as specified, replace the motor.

Stopping at Stop Position:

INSPECT WIPER MOTOR OPERATION




a. Operate the motor at low speed and stop the motor operation anywhere except at the stop position by disconnecting the positive (+) lead from terminal 3.




b. Connect terminals 3 and 5.
c. Connect the positive (+) lead from the battery to terminal6 and the negative (-) lead to terminal 1, check that the motor stops running at the stop position after the motor operates again.
If operation is not as specified, replace the motor.

INSPECT WIPER MOTOR CIRCUIT







Disconnect the connector from the motor and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.




INSPECT WIPER AND WASHER SWITCH CONTINUITY

WIPER OFF

WIPER INT

WIPER LO

WIPER HI

WASHER
If continuity is not as specified, replace the switch.

INSPECT WIPER AND WASHER SWITCH RESISTANCE




Inspect the switch resistance between terminals.
If resistance value is not as specified, replace the switch.

INSPECT WIPER AND WASHER SWITCH CIRCUIT







Disconnect the switch and wiper relay connector, inspect each connector on the wire harness side.
If continuity is not as specified, replace the switch.

INSPECT WASHER MOTOR OPERATION




Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, check that the motor operates.

NOTE: There tests must be performed quickly (within 20 seconds) to prevent the coil from burning out.

If operation is not as specified, replace the motor.

INSPECT WASHER MOTOR CIRCUIT







Disconnect the connector from the washer motor and inspect the connector on harness side.
If circuit is not as specified, inspect wire harness, power source or wiper switch.