The windshield wiper/washer system consists of the following
components:
| • | The wiper motor and transmission module |
| • | The wiper arm and blade assemblies |
| • | The washer solvent container |
| • | The wiper/washer switch |
The wiper/washer system operates in the following modes:
When the wiper switch is turned OFF, the wiper motor returns the wipers
to the park position.
Voltage is applied to the accessory voltage circuit when the ignition
is in the ACCY or ON position.
The wiper motor is equipped with radio frequency interference (RFI)
suppression.
Wash Operation
In the WASH mode, voltage is applied to the following circuits:
| • | Windshield wiper switch on signal |
| • | Windshield washer pump control |
The windshield washer pump sprays washer solvent onto the windshield.
The windshield wipers operate at low or high speed for 3-5 wipes and
return to the park position. If the wipers are in DELAY, LO, or HI mode,
they return to that operation after the wash cycle.
Mist Operation
In the MIST mode, voltage is applied to the following circuits:
| • | Windshield wiper switch on signal |
| • | Windshield wiper switch low/pulse signal |
The wipers make one sweep at low speed and return to the park position.
If the wiper switch is held in MIST mode, the wipers will continue to operate
until the switch is released.
Delay Operation
In the DELAY mode, voltage is applied to the following circuits:
| • | Windshield wiper switch on signal |
| • | Windshield wiper switch low/pulse signal |
The wipers make single sweeps with a time interval between sweeps. The
time interval is controlled by the wiper motor cover, based on the voltage
sent through the variable resistor in the wiper/washer switch.
Lo Operation
In the LO mode, voltage is applied to the following circuits:
| • | Windshield wiper switch on signal |
| • | Windshield wiper switch low/pulse signal |
The wiper motor runs continuously at low-speed.
Hi Operation
In the HI mode, voltage is applied to the following circuits:
| • | Windshield wiper switch on signal |
| • | Windshield wiper switch low/pulse signal |
| • | Windshield wiper switch high speed |
The wiper motor runs continuously at high-speed.
Park Position Operation
When turned OFF from any position, the wipers complete the last sweep
and park. When the wiper switch is turned OFF, battery voltage continues to
be applied to the accessory voltage circuit. The wiper motor continues to
run until the internal motor park switch opens.
Washer Fluid Indicator
The IPC illuminates the low washer fluid indicator when the following
occurs:
| • | The IPC detects a low washer fluid condition (signal circuit is
low). |
| • | The IPC performs the displays test at the start of each ignition
cycle. The indicator illuminates for approximately 3 seconds. |
