RAM 2500 Van V8-360 5.9L Magnum (1995)
Hydraulic Control Assembly - Antilock Brakes: Description and Operation
Rear Antilock Valve Circuit Operation
With Four Wheel Antilock Brakes
Circuit B120 from the ABS power relay supplies voltage for the isolation and decay solenoids in the rear anti-lock valve. The ABS control module
activates the solenoids by providing separate ground paths for each.
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Circuit B254 connects to cavity 26 of the ABS control module and provides ground for the right rear decay solenoid.
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Circuit B252 connects to cavity 28 of the ABS control module - and provides ground for the right rear isolation solenoid.
The rear anti-lock valve has one reset switch that provides an input to the ABS control module. Circuit B19 from the reset switch connects to the ABS
control module at cavity 19.
Circuit Z1 provides ground for the reset switch.
With Rear Wheel Antilock Brakes
The rear anti-lock valve contains an isolation solenoid, dump solenoid and reset switch. The RWAL control module powers each on separate circuits.
Circuit B108 from cavity 8 of the RWAL control module feeds the dump solenoid. The isolation solenoid is powered on circuit B1O1 from cavity 1 of
the RWAL control module. Circuit Z8 provides ground for both solenoids. Circuit Z8 terminates at the center of the dash panel in the engine
compartment.
Circuit B111 from cavity 11 of the RWAL control module connects to the reset switch. Circuit Z1 provides ground for the reset switch. The grounding
point for circuit Z1 is the left side of the dash panel in the engine compartment.
