2500 4x4 Pickup V8-318 5.2L Magnum (1995)
Brake Fluid Pump Relay: Description and Operation
When the ABS control module grounds the ABS pump relay on circuit B116, the relay contacts close connecting circuit A1O from the Power
Distribution Center (PDC) and circuit B12O. Circuit A1O connects to fuse 5 in the PDC. Circuit A2O from the fuse 14 in the fuse block splices to feed
the coil side of the ABS warning low lamp relay.
From the ABS pump relay, circuit B12O splices to supply voltage to the ABS pump motor and all solenoids in the front brake anti-lock valve. Circuit
B12O also supplies power to the solenoids in the rear antilock valve. Additionally, circuit B120 provides an input to cavity 34 of the ABS module. The
input tells the module that voltage has been supplied to the pump motor.
