Pinpoint Test F: DTC C1266: Notes

Refer to SYSTEM WIRING DIAGRAMS (Crown Victoria) or SYSTEM WIRING DIAGRAMS (Grand Marquis) article, Vehicle Dynamic Systems for schematic and connector information.

Fused battery voltage is provided to the ABS module from Battery Junction Box (BJB) fuses 109 (20A) and 106 (40A) along circuits 483 (RD) and 601 (LB/PK) respectively. Fused ignition voltage is provided from Central Junction Box (CJB) fuse 20 (10A) along circuit 1789 (VT/WH). When necessary, the ABS module supplies voltage to the Hydraulic Control Unit (HCU) assembly and the pump motor is activated. The ABS module is provided a ground along circuit 57 (BK) and the hydraulic pump motor is provided a ground internally through the HCU.

• DTC C1266 (ABS Valve Power Relay Circuit Failure) - If the ABS module detects an open circuit or a short to ground in the valve power circuit, DTC C1266 will be set.

This pinpoint test is intended to diagnose the following: 

• Fuses
• Wiring, terminals or connectors
• ABS module