C10 Short Between Control Module and Hydraulic Pump Relay

- Key OFF.

- Connect the breakout box with adapter to the antilock brake control module connector. Leave the antilock brake control module disconnected.

- Disconnect the hydraulic antilock actuator assembly connector.

- Measure the resistance of the "W/GN" wire between the BOB Pin 34 and ground.

- Measure the resistance of the "BR" wire between the BOB Pin 28 and ground.

- Are the resistances greater than 10,000 ohms?

YES -- Replace the antilock brake control module.

NO -- Service the wire(s) in question between the antilock brake control module and the hydraulic antilock actuator assembly.