Pinpoint Test A: No Communication With the Anti-lock Brake System (ABS) Module: Testing

A1 CHECK CIRCUIT 532 (OG/YE) FOR AN OPEN
- Key in OFF position.
- Disconnect: ABS module C135.
- Key in ON position.
- Measure the voltage between the ABS module C135-32, circuit 532 (OG/YE), harness side and ground.
  
  Fig 1: Checking Circuit 532 (OG/YE) For Open
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to A2.
- No : REPAIR the circuit. TEST the system for normal operation.
A2 CHECK CIRCUIT 1203 (BK/LB) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the ABS module C135-38, circuit 1203 (BK/LB), harness side and ground.
  
  Fig 2: Checking Circuit 1203 (BK/LB) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : REFER to MODULE COMMUNICATIONS NETWORK to continue diagnosis of the communication network.
- No : REPAIR the circuit. TEST the system for normal operation.