The Wiper/Washer System consists of the following components:

Accessory voltage is supplied to the windshield wiper/washer switch and the windshield wiper motor. During mist, low, and pulse/delay operation, voltage is supplied through the windshield wiper/washer switch to the on and pulse/delay signal circuits to the windshield wiper motor. The on signal circuit is supplied to the windshield wiper motor through a 24K ohm resistor when the switch is in the mist, pulse/delay, low, or high positions. The pulse/delay signal circuit determines the pulse/delay interval or low speed operation. During high speed operation the high speed signal circuit is closed to the accessory voltage circuit while the on and pulse/delay signal circuits remain at the voltage levels used to activate low speed operation. The accessory voltage supply circuit to the windshield wiper motor is used to operate the wiper motor during all operating modes.

When the windshield washer switch is pressed, accessory voltage is supplied through the switch to the windshield wiper switch on signal circuit. The 12 volt signal to the windshield wiper motor causes low speed operation to occur for as long as the washer switch is pressed and approximately 6 seconds after being released. Accessory voltage is supplied through the windshield washer switch to the windshield washer pump for as long as the switch is pressed.

Low Washer Fluid

The IPC illuminates the LOW WASHER FLUID indicator in the message center when the IPC receives a hardwire input from the low washer fluid level sensor (signal is low).