Pinpoint Test H : The LH (Left-Hand) Rear Window Control Switch Illumination Is Inoperative Or Always On: Notes
WARNING: This page is about a different car, the 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Power Windows for schematic and connector information.
Normal Operation and Fault Conditions
Based on messages received from the BCM, the DDM commands the Driver Rear Door Module (DRDM) to supply voltage and ground to illuminate the LH rear window control switch via a LIN circuit.
| DTC | Description | Fault trigger conditions |
|---|---|---|
| B12FF:11 | Rear Door Switch Illumination: Circuit Short To Ground | This DTC sets on-demand and in continuous memory in the DDM when the Driver Rear Door Module (DRDM) detects a higher than expected current draw on the window control switch illumination output circuit. |
| B12FF:15 | Rear Door Switch Illumination: Circuit Short To Battery or Open | This DTC sets on-demand and in continuous memory in the DDM when the Driver Rear Door Module (DRDM) detects a lower than expected current draw on the window control switch illumination output circuit. |
Possible Sources
- Wiring, terminals or connectors
- LH rear window control switch
- Driver Rear Door Module (DRDM)