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

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: The Flex Probe Kit must be used for all test connections. Use of standard multimeter probes may damage wiring terminals.

K1 CHECK CIRCUIT 483 (RD) FOR AN OPEN
- Disconnect: ABS module C135.
- Measure the voltage between ABS module C135-14, circuit 483 (RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between ABS Module C135-14, Circuit 483 (RD), And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . TEST the system for normal operation.

No : VERIFY BJB fuse 109 (20A) is OK. If OK, REPAIR circuit 483 (RD) for an open. CLEAR the DTCs. TEST the system for normal operation.