Circuit Description

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) monitors the front wiper relay control circuit 1445 of the front wiper relay. The voltage level should be high while the front wiper relay is de-energized. The voltage will be near system voltage while the relay is de-energized. When the front wiper switch is in intermittent or mist, voltage from the windshield wiper washer switch is applied to the front wiper input of the BCM. The BCM responds by switching circuit 1445 to ground. This action energizes the front wiper relay, providing low speed operation of the windshield washer fluid pump during single swipes. Control of the wiper during LO or HIGH speed switch settings is direct wired from the windshield wiper washer switch to the windshield washer fluid pump and is not under the control of the BCM.