2500 4x4 Pickup V8-318 5.2L Magnum (1995)
Brake Warning Indicator: Description and Operation
ABS Warning Lamp Circuit Operation
Four Wheel Antilock Brakes
The ABS control module operates the ABS warning lamp through the ABS warning lamp relay. When the ABS module grounds the warning lamp relay
on circuit B47, the relay contacts close and complete the ground path for the ABS warning lamp. Circuit B47 connects to pin 13 of the ABS module and
the coil side of the relay. Circuit A20 from fuse 4 in the fuse block supplies power to the coil side of the relay.
Circuit G19 from the ABS warning lamp in the instrument cluster is double crimped at the contact side of the ABS warning lamp relay. Power for the
bulb is supplied by the printed circuit board in the instrument cluster. The G19 branch leaving the relay provides an input to the ABS control module at
cavity 24 of the module. Circuit Z1 provides a ground path for the contact side of the relay.
Rear Wheel Antilock Brakes
The Rear Wheel Anti-Lock (RWAL) module provides ground for the instrument cluster Check Anti-Lock warning lamp on circuit G19. Circuit F14
provides voltage to the instrument cluster to feed the warning lamp.
