Pinpoint Test D : One Or Both Low Beams Are On Continuously - Halogen Or Led (Light Emitting Diode) Headlamps: 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 Headlamps/Autolamps for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Exterior Lighting - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B143B:11 | Autolamp On Input: Circuit Short to Ground | An on-demand DTC that sets when the BCM detects a short to ground on the autolamp on input circuit. |
| B143C:11 | Headlamp Off Input: Circuit Short to Ground | An on-demand DTC that sets when the BCM detects a short to ground on the headlamp off input circuit. |
| B143D:11 | Headlamp On Input: Circuit Short to Ground | An on-demand DTC that sets when the BCM detects a short to ground on the headlamp on input circuit. |
| B143E:11 | Headlamp Switch Input: Circuit Short to Ground | A continuous memory DTC that sets when the BCM detects a short to ground on the headlamp switch input circuits. |
| B1447:11 | Parklamp On Switch Input: Circuit Short to Ground | An on-demand DTC that sets when the BCM detects a short to ground on the parklamps on input circuit. |
| B1D00:15 | Left Low Beam: Circuit Short to Battery or Open | A continuous memory and on-demand DTC that sets when the BCM detects a short to voltage from the LH low beam output circuit. |
| B1D01:15 | Right Low Beam: Circuit Short to Battery or Open | A continuous memory and on-demand DTC that sets when the BCM detects a short to voltage from the RH low beam output circuit. |
Possible Sources
- Wiring, terminals or connectors
- Headlamp switch
- BCM
Visual Inspection and Diagnostic Pre-checks
- Inspect the headlamp switch for damage.