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

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 ABS module C135-32, circuit 532 (OG/YE), harness side and ground.
  
  Fig 1: Measuring Voltage Between ABS Module C135-32, Circuit 532 (OG/YE), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: GO to A2.

No: VERIFY smart junction box (SJB) fuse 19 (10A) is OK, If OK, 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 ABS module C135-38, circuit 1203 (BK/LB), harness side and ground.
  
  Fig 2: Measuring Resistance Between ABS Module C135-38, Circuit 1203 (BK/LB), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes: REFER to COMMUNICATIONS NETWORK to continue diagnosis of the communication network.

No: REPAIR the circuit. TEST the system for normal operation.