Pinpoint Test H : The Defrost System Is Inoperative: Notes
WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
Refer to HEATED WINDOW for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Glass, Frames and Mechanisms - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| HVAC B1C83:12 | Rear Defog Relay: Circuit Short To Battery | This DTC sets when the HVAC module detects a short to voltage on the rear window defrost relay control circuit. |
| HVAC B1C83:14 | Rear Defog Relay: Circuit Short To Ground Or Open | This DTC sets when the HVAC module detects an open or short to ground on the rear window defrost relay control circuit. |
Possible Sources
- Fuse
- Rear window defrost relay
- Wiring, terminals or connectors
- Rear window defrost grid
- HVAC module
Visual Inspection and Pre-checks
- Verify BJB fuse 35 (40A) is OK.
- Inspect the rear window defrost grid and electrical connectors for damage.