Pinpoint Test A: No Communication With The Abs Module

A1 CHECK CIRCUITS 601 (LB/PK) AND 483 (RD) FOR AN OPEN
- Key in OFF position.
- Disconnect: ABS Module C155.
- Key in ON position.
- Measure the voltage between the ABS module C155-32, circuit 601 (LB/PK), harness side and ground; and between the ABS module C155-2, circuit 483 (RD), harness side and ground.
  
  Fig 1: Checking Circuits 601 And 483 For Open
  Courtesy of FORD MOTOR CO.
- Are the voltages greater than 10 volts?
Yes

GO to A2.

No

REPAIR the circuit in question. REPEAT the self-test.
A2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the ABS module C155-16, circuit 1205 (BK), harness side and ground; and between the ABS module C155-45, circuit 1205 (BK), harness side and ground.
  
  Fig 2: Checking Circuit 1205 For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes

CHECK the module communications network. REFER to MODULE COMMUNICATIONS NETWORK .

No

REPAIR THE circuit. REPEAT the self-test.