Wiper and Washer Systems: Description and Operation

Front Wiper and Washer

SYSTEM OUTLINE
With the ignition SW turned on, current flows to TERMINAL 8 of the front wiper and washer SW, TERMINAL 2 of the front wiper motor, TERMINAL 2 of the front washer motor through the WIP fuse.

1. LOW SPEED POSITION
With the wiper SW turned to LOW position, current flows from TERMINAL 8 of the front wiper and washer SW to TERMINAL 7 to TERMINAL 1 of the front wiper motor to TERMINAL 5 to GROUND, causing the front wiper motor to run at low speed.

2. HIGH SPEED POSITION
With the wiper SW turned to HIGH position, current flows from TERMINAL 8 of the front wiper and washer SW to TERMINAL 9 to TERMINAL 4 of the front wiper motor to TERMINAL 5 to GROUND, causing the front wiper motor to run at high speed.

3. INT POSITION
With the wiper SW turned to INT position, the wiper relay operates and the current which is connected by relay function flows from TERMINAL 8 of the front wiper and washer SW to TERMINAL 5 to GROUND. This operates the intermittent circuit and current flows from TERMINAL 8 of the front wiper and washer SW to TERMINAL 7 to TERMINAL 1 of the front wiper motor to TERMINAL 5 to GROUND, and operating the wiper.

4. MIST POSITION
With the wiper SW turned to MIST position, current flows from TERMINAL 8 to TERMINAL 7 to TERMINAL 1 of the front wiper motor to TERMINAL 5 to GROUND, causing the front wiper motor to run at low speed.

5. WASHER CONTINUITY OPERATION
With the washer SW pulled to on, current flows from TERMINAL 2 of the front washer motor to TERMINAL 1 to TERMINAL 4 of the front wiper and washer SW to TERMINAL 5 to GROUND, causing the washer motor to run, and the window washer emits a water spray. This causes current to flow to washer continuity operation circuit in TERMINAL 8 of the front wiper and washer SW to TERMINAL 7 to TERMINAL 1 of the front wiper motor to wiper motor to TERMINAL 5 to GROUND, operating the wiper.

Rear Wiper and Washer

SYSTEM OUTLINE
When the ignition SW is turned on, current flows to TERMINAL 2 of the rear washer motor, TERMINAL 3 of the rear wiper motor and relay through the RR WIP fuse.

1. REAR WIPER NORMAL OPERATION
With the ignition SW turned on and rear wiper and washer SW turned on, current to TERMINAL 3 of the rear wiper motor and relay flows to TERMINAL 1 of the rear wiper motor and relay to TERMINAL 2 of the rear wiper and washer SW to TERMINAL 5 to GROUND. Thus, the relay coil is activated and current to the rear wiper motor to motor to GROUND, causing the motor to operate the wiper.

2. REAR WIPER INTERMITTENT OPERATION
When the ignition SW is turned on and the rear wiper and washer SW is turned to INT position, current to TERMINAL 3 of the rear wiper motor and relay flows to TERMINAL 2 of the rear wiper motor and relay to TERMINAL 1 of the rear wiper and washer SW to TERMINAL 5 to GROUND.
This causes the motor to operate (The point changes) and the intermittent circuit of the relay operates. Intermittent operation of the circuit is controlled by the charging and discharging of the condenser installed inside the relay.

3. WASHER OPERATION
With the ignition SW turned on and the rear wiper and washer SW turned to ON position, when the wiper SW is turned further, current to TERMINAL 2 of the rear washer motor flows to TERMINAL 1 to TERMINAL 3 of the rear wiper and washer SW to TERMINAL 5 to GROUND so that the washer motor rotates and the window washer emits a water, only while the switch is fully turned.
When the wiper SW is off and then turned washer on (Wiper off side), the wiper SW is on and then turned to washer on (Wiper on side), only the washer operates.