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Pinpoint Test H: No Communication With The Abs Module

CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.
  1. H1 CHECK CIRCUITS 601 (LB/PK) AND 493 (BK/PK) FOR AN OPEN 
    Fig 1: Measuring Voltage Between ABS Module C155-4, Circuit 601 (LB/PK), Harness Side And Ground
    G03961775Courtesy of FORD MOTOR CO.
    1. Turn ignition off.
    2. Disconnect ABS Module C155 connector.
    3. Turn ignition on.
    4. Measure the voltage between the ABS module C155-4, circuit 601 (LB/PK), harness side and ground; and between the ABS module C155-32, circuit 493 (BK/PK), harness side and ground.
    • Are the voltages greater than 10 volts? 
    1. Yes  : GO to H2.
    2. No  : REPAIR the circuit(s) in question. REPEAT the self-test.
  2. H2 CHECK CIRCUIT 274 (BK/WH) FOR AN OPEN 
    Fig 2: Measuring Resistance Between The ABS Module C155-16, Circuit 274 (BK/WH) And Ground
    G03961776Courtesy of FORD MOTOR CO.
    1. Turn ignition off.
    2. Measure the resistance between the ABS module C155-16, circuit 274 (BK/WH), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. Yes  : CHECK the module communications network. Refer to MODULE COMMUNICATIONS NETWORK .
    2. No  : REPAIR the circuit. REPEAT the self-test.
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