Pinpoint Test D : Both Rear Fog Lamps Are Inoperative: Notes
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Wiring Diagram 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 |
|---|---|---|
| B1A79:11 | Rear Fog Lamp: Circuit Short To Ground | A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the rear fog lamp output 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 from the rear fog lamp output circuit. |
| U1000:00 | Solid State Driver Protection Active -Driver Disabled: No Sub Type Information | This DTC sets when the BCM has temporarily shut down the output driver. The module has temporarily disabled an output because an excessive current draw exists (such as a short to ground). The BCM cannot enable the output until the cause of the short is corrected, the Diagnostic Trouble Codes (DTCs) have been cleared and a successful self-test is run. For additional information on BCM Field Effect Transistor (FET) protection, REFER to: Module Controlled Functions - System Operation and Component Description . |
| U3000:49 | Control Module: Internal Electronic Failure | This DTC sets when the BCM has permanently shut down the output driver. The module has permanently disabled an output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the BCM can withstand. CORRECT the cause of the excessive current draw before installing a new BCM. For additional information on BCM Field Effect Transistor (FET) protection, REFER to: Module Controlled Functions - System Operation and Component Description . |
Possible Sources
- Wiring, terminals or connectors
- Headlamp switch
- Rear fog lamp
- BCM
Visual Inspection and Diagnostic Pre-checks
- Inspect the headlamp switch for damage.