Pinpoint Test E : The Rear Fog Lamp Is On Continuously: Notes
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Fog Lamps for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Exterior Lighting - Overview .
REFER to: Exterior Lighting - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1047:11 | Rear Fog Lamp Control Switch: Circuit Short To Ground | A continuous memory and on-demand DTC that sets when the BCM detects a short to ground on the rear fog lamp on input circuit. |
| B1A79:15 | Rear Fog Lamp: Circuit Short To Battery or Open | A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the rear fog lamp output circuit. |
Possible Sources
- Wiring, terminals or connectors
- Headlamp switch
- BCM
Visual Inspection and Diagnostic Pre-checks
- Inspect the headlamp switch for damage.