Front Wiper Motor 2000 (1st Design)
Battery voltage for the front wiper motor is supplied from the 25A WIPER fuse in the instrument panel fuse block (IPFB) through circuit 143 to terminal E of the front wiper motor. Circuit 143 supplies power to the front wiper motor, a transistor that allows current flow to the front washer pump motor, and the wiper control circuit board contained within the wiper motor housing. This wiper control circuit board supplies voltage to the front wiper switch through circuit 92 and circuit 96. The wiper control circuit board will control the front wiper motor based on inputs from the front wiper switch. The logic within the wiper control circuit board can determine the position of the front wiper switch based on the resistance of circuit 92 or circuit 96. The front wiper motor grounds through circuit 350 at I/P splice pack #1.
Front Wiper Control - All
LOW Speed Operation
Wiper switch in the LO position. Power is fed through circuit 96 from the front wiper motor to the front wiper switch terminal E. Current flows through a resistor (RL) to the LO contact of the wiper switch. When the front wiper switch is turned to the LO position, current flows through the closed contacts of the switch to terminal A of the front wiper switch and grounds through circuit 350. The logic control of the front wiper motor senses the voltage and runs the front wiper motor at low speed.
HIGH Speed Operation
Wiper switch in the HI position. Power is fed through circuit 92 from the front wiper motor to the front wiper switch terminal F. Current flows to the HI contact of the wiper switch. When the front wiper switch is turned to the HI position, current flows through the closed contacts of the switch to terminal A of the front wiper switch and grounds through circuit 350. The logic control of the front wiper motor senses the voltage and runs the front wiper motor at high speed.
INT/MIST Operation
When intermittent or mist operation of the windshield wiper is selected, power is fed through circuit 96 from front wiper motor to the front wiper switch terminal E. Current flows through a resistor (RL) to the INT contact of the wiper switch. When the front wiper switch is turned to the INT position, current flows through the resistors in position 1, 2 or 3 of the INT contacts to terminal A of the front wiper switch and grounds through circuit 350. The logic control of the front wiper motor senses the resistance and runs the front wiper motor with the selected delay.
If the front wiper switch is turned to the MIST position, current flows through the closed switch contacts to terminal A, and grounds through circuit 350. When the MIST function is activated, the wiper arms will cycle one time, and then park.
Intermittent Wiper Delay Operation
The intermittent wiper delay switch has 3 switch positions.
| • | Delay 1 (2000 ohms resistance, 1 swipe every 12 seconds) |
| • | Delay 2 (1000 ohms resistance, 1 swipe every 7 seconds) |
| • | Delay 3 (500 ohms resistance, 1 swipe every 2 seconds) |
Front Washer Motor - All
Power is fed through circuit 96 from the front wiper motor to the front wiper switch terminal E. Current flows through a resistor (RW) to the front washer switch contact of the front wiper switch. When the front washer switch is closed, current flows through the closed contacts of the switch to terminal A of the front wiper switch and grounds through circuit 350. The logic control of the front wiper motor senses the resistance and turns on a transistor. Battery voltage flows through the transistor to terminal A of the front wiper motor. Current flow continues from terminal A through circuit 94 to terminal 1 of the front washer pump. The current flows through the front washer pump through circuit 150 to ground.
Rear Wiper Control - Wagon
Battery voltage from circuit 580 is supplied from the 15A SUN fuse through circuit 580 to terminal D, the rear wiper switch. When the rear wiper switch is turned to the WIPE position, current flows through the rear wiper switch contacts to terminal C of the rear wiper switch. Current flow continues through circuit 393 to terminal B of the rear wiper motor, through the rear wiper motor to terminal C of the rear wiper motor connector and grounds through circuit 550.
Rear Washer Motor - Wagon
Battery voltage from circuit 580 flows from the 15A SUN fuse through circuit 580 to terminal D, the rear wiper switch. When the rear wiper switch is turned to the WASH position, current flows through the rear wiper switch contacts to terminal B of the rear wiper switch. Current flow continues through circuit 392 to terminal 1 of the rear washer motor, through the rear washer motor to terminal 2 of the rear washer motor connector and grounds through circuit 550.
