Pinpoint Test E: DTC C1266 - Abs Power Valve Relay Circuit Failure

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. 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 multi-meter probes.

E1 CHECK THE VOLTAGE TO THE ABS MODULE
- Key in OFF position.
- Disconnect: ABS Module C135
- Measure the voltage between ABS module C135-25, circuit 532 (OG/YE), harness side and ground.
  
  Fig 1: Checking Voltage To ABS Module
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
1. YES : Go to E2.
2. NO : VERIFY CJB fuse 103 (20A) is OK. If OK, REPAIR circuit 532 (OG/YE). CLEAR the DTCs. REPEAT the self-test.
E2 CHECK CIRCUIT 530 (LG/YE) FOR AN OPEN
- Measure the resistance between ABS module C135-38, circuit 530 (LG/YE), harness side and ground.
  
  Fig 2: Checking Circuit 530 (LG/YE) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. YES : Go to E3.
2. NO : REPAIR circuit 530 (LG/YE). CLEAR the DTCs. REPEAT the self-test.
E3 CHECK FOR CORRECT ABS MODULE OPERATION
- Check ABS module C135 for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect: ABS Module C135
- Make sure the connector seats correctly, then operate the system and verify the concern is still present.
- Is the concern still present?
1. YES : INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module in this article. TEST the system for normal operation.
2. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.