Pinpoint Test A : One Or Both Low Beams Is Inoperative: Notes
WARNING: This page is about a different car, the 2018 Lincoln MKC. 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 |
|---|---|---|
| B1499:11 | Exterior Lamps Power Supply "A": Circuit Short To Ground | A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the exterior lamps power supply "A" output circuit. |
| B1499:15 | Exterior Lamps Power Supply "A": 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 exterior lamps power supply "A" output circuit. |
| B149D:11 | Exterior Lamps Power Supply "B": Circuit Short To Ground | A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the exterior lamps power supply "B" output circuit. |
| B149D:15 | Exterior Lamps Power Supply "B": 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 exterior lamps power supply "B" output circuit. |
| B1D00:11 | Left Low Beam: Circuit Short To Ground | A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH low beam output 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 an open from the LH low beam output circuit. |
| B1D01:11 | Right Low Beam: Circuit Short To Ground | A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH 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 an open from the RH low beam output circuit. |
Possible Sources
- Fuse(s)
- Wiring, terminals or connectors
- Bulb
- Ballast
- Headlamp assembly
- BCM
Visual Inspection and Diagnostic Pre-checks
- Inspect the headlamp assembly for damage.
- Verify BJB fuses 30 (20A) and 31 (20A) are OK