2500 4x4 Pickup L6-359 5.9L DSL Turbo (1995)
Hydraulic Control Assembly - Antilock Brakes: Description and Operation
Front Antilock Valve Circuit Operation
Circuit B120 from the ABS power relay supplies voltage for the ABS pump motor plus the isolation and dump solenoids in the front anti-lock valve. The
ABS control module activates the pump motor and the solenoids by providing separate ground paths for each.
The ABS module provides a ground path for the motor on circuit B60. Circuit B60 connects to cavity 2 of the ABS control module two-way connector.
The ABS control module cycles the isolation and dump solenoids in the front anti-lock valve by providing a ground path for each on separate circuits:
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Circuit B248 connects to cavity 30 of the ABS control module and provides ground for the right front dump solenoid.
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Circuit B249 connects to cavity 33 of the ABS control module and provides ground for the right front isolation solenoid.
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Circuit B243 connects to cavity 35 of the ABS control module and provides ground for the left front dump solenoid.
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Circuit B245 connects to cavity 37 of the ABS control module and provides ground for the left front isolation solenoid.
There are two reset switches in the front anti-lock valve; a left switch and a right switch, both provide inputs to the ABS control module. Circuit B5 from
the left reset switch connects to ABS module cavity 5 while circuit B18 from the right reset switch connects to cavity 18.
