1500 4x2 Pickup V8-5.2L CNG VIN T (1996)
Brake Proportioning/Combination Valve: Description and Operation
RWAL Valve
CIRCUIT OPERATION
The rear wheel anti-lock (RWAL) valve contains an isolation solenoid, a dump solenoid and a reset switch. Each is powered by the Controller
Anti Lock Brake (CAB) on separate circuits.
Circuit B105 from cavity 5 of the CAB feeds the dump solenoid. The isolation solenoid is powered on circuit B101 from cavity 1 of the CAB.
Circuit Z8 provides ground for both solenoids.
Circuit B111 from cavity 11 of the CAB connects to the reset switch. The case grounded RWAL valve provides ground for the reset switch.
Circuit B120 from the ABS pump relay supplies voltage for the isolation and dump solenoids in the Rear Wheel Antilock (RWAL) valve. The
Controller Antilock Brake (CAB) activates the solenoids by providing separate ground paths for each.
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Circuit B254 connects to cavity 26 of the CAB and provides ground for the rear dump solenoid.
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Circuit B252 connects to cavity 28 of the CAB and provides ground for the rear isolation solenoid.
The RWAL valve has one reset switch that provides an input to the CAB. Circuit B19 from the reset switch connects to CAB cavity 19.
