Low Speed

CIRCUIT OPERATION
When the LOW speed switch is activated a multiplexed signal is sent to the Body Control Module (BCM) on circuit V52. The BCM then turns the wipers ON low speed by providing a ground path for circuit V14. The BCM then grounds circuit V14, which is the coil side of the wiper ON relay. This causes the relay to switch from its normally grounded position to its powered position. This connects the output of fuse 9, a 30 Amp in the PDC to circuit V5.

The V5 circuit is connected to the HI/LOW Wiper relay LOW speed side. Voltage is passed through the relay to circuit V3, then to the LOW speed side of the wiper motor. Ground for the wiper motor is provided on circuit Z1.

When the wiper motor completes one cycle, the BCM turns OFF the motor by deactivating the wiper relays.

As the windshield wiper motor turns, the park switch internal to the motor moves from its grounded position to the open RUN position. The BCM uses input from the park switch, on circuit V7, for wiper position and system operation.