Left Hand Drive

The ABS main relay, located in the power distribution center (PDC), has two functions. First, when the relay is energized, it supplies power to the valve/solenoids in the valve block assembly and the pump/motor relay coil. Second, when the relay is de-energized, it supplies a ground to turn on the ANTI LOCK warning lamp. The main relay is controlled by the Controller, Anti-lock Brake (CAB). The CAB energizes the main relay when it receives an ignition input signal.

When the ABS module grounds the ABS power relay on circuit B207, the relay switches to connect circuit A20 from PDC fuse 10 to circuit B235. Circuit B236 from fuse 7 in the fuse block splices to feed the coil side of the ABS power relay. Circuit B207 connects to cavity 34 of the ABS control module.

Circuit B235 is double crimped at the ABS power relay. One branch of circuit B235 supplies power to the coil side of the ABS pump motor relay. The other branch of circuit B235 splices to cavities 3 and 33 of the ABS control module and to the hydraulic control unit.