Brake Fluid Pump Relay: Description and Operation

The Antilock Brake System (ABS) pump motor relay controls when the pump motor runs. Power for the coil side of the relay is supplied from cavity 47 of the ABS control module on the B47 circuit. This circuit also supplies voltage for the contact side of the system relay. The ground side of the coil is controlled by the B116 circuit. Circuit B116 connects to cavity 16 of the ABS control module connector.

Circuit B120 from cavity 20 of the ABS control module connector powers the ABS pump motor. This circuit is also used as an input to the ABS control module for pump motor monitoring.