The wipers are operative when the vehicle is in ACCESSORY or RUN and have 4 different modes. The 4 modes are MIST, Intermittent, Low, and High. When the wipers are in the intermittent mode, there are 3 delay modes to chose from, commanded by the wiper switch through the body control module (BCM). The wipers are powered through the wiper switch except for the intermittent mode. The intermittent mode is controlled by the BCM. By putting the wiper switch in the wash mode, the wipers will spray washer fluid on the windshield and the wipers will then clean the windshield. The wipers will be controlled by the BCM while in this mode of operation.
High Operation
In the high position, the windshield wiper switch supplies voltage to the high speed circuit of the windshield wiper motor. The windshield wiper motor will operate at high speed.
Intermittent Operation
The body control module (BCM) controls the wipers, when the switches are in the intermittent mode. When the BCM receives an input from the switch, the BCM controls the input into the wiper relay. The BCM will energize the relay, commanding the wipers ON. There are 3 intermittent positions for the wipers. The intermittent switch, located in the wiper switch, sends inputs to the BCM indicating the speed the wipers should be in. The 3 intermittent wiper speeds are as follows:
| • | 1 second |
| • | 7 seconds |
| • | 12 seconds |
Low Operation
In the Low position, the windshield wiper switch supplies voltage to the low/mist circuit of the windshield wiper motor. The windshield wiper motor will operate continuously at low speed.
Mist Operation
In the MIST position, the windshield wipers switch supplies voltage to the low/mist circuit of the windshield wiper motor.
The windshield wipers make one sweep at low speed and returns to the PARK position. If the windshield wiper/washer switch is held in MIST mode, the windshield wipers will continue to operate until the switch is released.
Park Position Operation
The wiper fuse, supplies voltage to signal circuit of the wiper motor. The signal will be pulled to voltage by the wiper motor while the windshield wiper motor is operating. When the windshield wiper motor has parked, the signal is at ground.
Wash Operation
When the switch is in the washer position, voltage will be supplied to one side of the washer motor while the other side of the motor is grounded.
At this point, the windshield washer pump sprays solvent onto the windshield. When the washer is activated, the body control module (BCM) receives an input from the switch that it is activated. The BCM will control the wipers while in the WASH mode. The BCM will control the wiper relay to turn on the wipers operating at low speed for 3 swipes and returns to the PARK position.
