Circuit Description
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) controls and monitors the state of the Windshield Washer Fluid Pump control circuit. The BCM supplies B+ to the pump and the pump is grounded at G100. The voltage level from the BCM should be low while the pump is OFF. The Voltage should be near B+ when the BCM commands the pump ON.