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

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

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.