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

WARNING: This page is about a different car, the 2005 Lincoln Navigator and 2005 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

A1 CHECK THE VOLTAGE TO THE ABS MODULE

Key in OFF position.
Disconnect: ABS Module C135.
Key in ON position.

Measure the voltage between the ABS module C135 pins, harness side and ground as follows:

Pin	Circuit
1	534 (YE/LG)
4	533 (TN/RD)
32	532 (OG/YE)

Are the voltages greater than 10 volts?

Yes : GO to A2.
No : REPAIR the circuit in question. TEST the system for normal operation.

A2 CHECK THE ABS MODULE GROUNDS
- Key in OFF position.
- Measure the resistance between the ABS module C135 pin 16, circuit 530 (LG/YE), harness side and ground; and between the ABS module C135 pin 47, circuit 530 (LG/YE), harness side and ground.
  
  Fig 1: Checking ABS Module Grounds
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : CHECK the module communication network. REFER to MODULE COMMUNICATIONS NETWORK .
- No : REPAIR the circuit. TEST the system for normal operation.