Pinpoint Test F: No Communication With The Anti-Lock Brake System (Abs) Module

CAUTION: The Flex Probe Kit must be used for all test connections. Use of standard multimeter probes may damage wiring terminals.

F1 CHECK CIRCUITS 601 (LB/PK) AND 88 (BK/WH) FOR AN OPEN

Key in OFF position.
Disconnect: Anti-lock Brake System (ABS) Module C135.
Key in ON position.

Measure the voltage between the ABS module C135 pins and ground as follows:

PIN AND CIRCUIT SPECIFICATION

Pin	Circuit
8	88 (BK/WH)
13	601 (LB/PK)
14	483 (RD)

Are the voltages greater than 10 volts?

Yes : GO to F2.
No : REPAIR the circuit in question. TEST the system for normal operation.

F2 CHECK THE ABS MODULE GROUNDS
- Measure the resistance between the ABS module C135 pin 15, circuit 57 (BK), harness side and ground; and between the ABS module C135 pin 12, circuit 57 (BK), harness side and ground.
  
  Fig 1: Measuring Resistance Between ABS Module C135 Pin 15, Circuit 57 (BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : REFER to MODULE COMMUNICATIONS NETWORK .
- No : REPAIR the circuit in question. TEST the system for normal operation.