Pinpoint Test C : One Or More Trailer Stop/Turn Lamps Are Always On: 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 Trailer/Camper Adapter 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 |
|---|---|---|
| B1D08:12 | Left Trailer Direction Indicator: Circuit Short To Battery | A continuous memory and on-demand DTC that sets when the TRM detects a short to voltage from the LH trailer stoplamp/turn signal output circuit. |
| B1D09:12 | Right Trailer Direction Indicator: Circuit Short To Battery | A continuous memory and on-demand DTC that sets when the TRM detects a short to voltage from the RH trailer stoplamp/turn signal output circuit. |
Possible Sources
- Fuse
- Wiring, terminals or connectors
- Trailer concern
- Trailer tow connector
- TRM
Visual Inspection and Diagnostic Pre-checks
- Inspect the trailer tow connector for signs of corrosion or damage. Repair or install a new trailer tow connector as required.