Normal Operation
WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
The instrument cluster receives the ABS status from the ABS module through hardwired circuitry. When an ABS concern is present, the ABS module sends the instrument cluster a command to illuminate the ABS warning indicator. If the instrument cluster detects a fault condition in the ABS, the instrument cluster turns on the ABS warning indicator.
DTC C1221 - sets if circuit CCA01 (BU/OG) becomes shorted to ground and the instrument cluster defaults the ABS warning indicator on.
Possible Causes
- Circuit CCA01 (BU/OG) open or short to ground
- ABS module
- Instrument cluster