Front Wiper Control

LOW SPEED OPERATION
Wiper switch in the LO position. Power is fed through circuit 343 from the 25 amp front wiper fuse to the Underhood Fuse Block (UHFB) where it goes through the front wiper relay. From the UHFB it travels through circuit 97 to terminal J of the wiper switch. Power flows through the closed contacts of the wiper switch to circuit 95, terminal H through the engine inline terminal C5 (L61), or terminal C1 (L81) to terminal 1 of the front wiper motor connector. Power flows through the wiper motor to terminal 2 circuit 150 to the front wiper motor ground.

HIGH SPEED OPERATION
Wiper switch in the HI position. Power is fed through circuit 343 from the 25 amp front wiper fuse to the Underhood Fuse Block (UHFB) where it goes through the front wiper relay. From the UHFB it travels through circuit 97 to terminal J of the wiper switch. Power flows through the closed contacts of the wiper switch to terminal G circuit 92, through the engine inline terminal C4 (L61) or terminal C6 (L81) to terminal 5 of the front wiper motor connector. Power flows through the wiper motor to terminal 2 circuit 150 to the front wiper motor ground.

INT/MIST OPERATION
When intermittent or mist operation of the windshield wiper is selected, battery voltage from the wiper switch is applied to the front wiper input of the Body Control Module (BCM). The BCM responds by switching circuit 1445 to ground. This action energizes the front wiper relay, providing low speed operation of the wiper motor during single swipes.

Control of the wiper during continuous LO or HI speed switch settings is direct wired from the wiper switch to the wiper motor and is not under the control of the BCM.

INTERMITTENT WIPER DELAY OPERATION
The intermittent wiper delay switch is a voltage divider connected across BCM inputs circuit 113 and circuit 96. The wiper relay is energized by the BCM switching circuit 1445 to ground depending on delay switch position.

The intermittent wiper delay switch has three 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)