25 Pin, 3 Channel ABS

Power/Ground to Anti-Lock Brake System (ABS) Module

If the fuse had failed:

A. Check the weather packing of the power connector to the ABS module C104b (Excursion C104).

B. Remove power distribution box fuse F (60A).

C. Measure the resistance between the outside pin of power distribution box fuse F (60A), circuit 532 (OG/YE), and ground.

D. Spray with water and wiggle the wiring between the power distribution box and the ABS module.

E. If any continuity is measured, repair or install new wiring.

Check for opens in wiring:

A. Disconnect the ABS module C104b (Excursion C104).

B. While measuring the voltage between ABS module C104b (Excursion C104) pins 9 and 25, circuit 532 (OG/YE), and negative battery post, wiggle the wiring harness.

C. If the voltage momentary drops below 10 volts while the harness is wiggled, repair or install new wiring.

D. While measuring the resistance between the ABS module C104b (Excursion C104) pins 8 and 24, circuit 530 (LG/RD), and ground, wiggle the wiring harness.

E. If the resistance momentarily goes above 5 ohms, while the harness is wiggled, repair or install new wiring.