RAM 2500 Van V8-360 5.9L Magnum (1995)
ABS Main Relay: Description and Operation
When the Anti-Lock Brake System (ABS) control module grounds the ABS power relay on circuit B116, the relay contacts close connecting circuit A10
from the Power Distribution Center (PDC) and circuit B120. Circuit A1O connects to fuse 4 in the PDC. Circuit A2O from fuse 5 in the fuse block
splices to feed the coil side of the ABS power relay.
From the ABS power relay, circuit B120 splices to supply voltage to the ABS pump motor and all the solenoids in the front brake anti-lock valve. Circuit
B120 also supplies power to the solenoids in the rear anti-lock valve. Additionally, circuit B120 provides an input to cavity 34 of the ABS control
module. The input tells the ABS control module that voltage has been supplied to the pump motor.
