Symptom Chart: Interior Lighting
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.
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
| Condition | Possible Sources | Actions |
|---|---|---|
| A module does not respond to the scan tool | Fuse Wiring, terminals or connectors Module |
REFER to: Communications Network . |
| The courtesy lamps do not illuminate with a door open | Refer to the Pinpoint Test | GO to Pinpoint Test A |
| The courtesy lamps do not illuminate with the liftgate open | Refer to the Pinpoint Test | GO to Pinpoint Test J |
| One or more interior courtesy lamps are inoperative | Refer to the Pinpoint Test | GO to Pinpoint Test B |
| A welcome mat lamp is inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test H |
| Both welcome mat lamps are inoperative | Exterior mirror position Module communication Module |
NOTE:
If any module communication Diagnostic Trouble Codes (DTCs) are present, diagnose those first. Make sure the exterior mirrors are in the fully folded position. The welcome mat lamps only illuminate when the exterior mirrors are in the fully folded position. If the exterior mirrors are fully folded and the DDM and PDM pass the network test, Refer to: BCM Hardware Testing -- MKC
. |
| One or more exterior door handle LED is inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test K |
| All the courtesy lamps stay on continuously | Refer to the Pinpoint Test | GO to Pinpoint Test C |
| The interior courtesy lamps stay on continuously | Refer to the Pinpoint Test | GO to Pinpoint Test D |
| One or more demand lamps are inoperative | Refer to the Pinpoint Test | GO to Pinpoint Test E |
| The battery saver does not deactivate after time-out | Refer to the Pinpoint Test | GO to Pinpoint Test F |
| The ambient lighting is inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test G |
| All the ambient lighting Light Emitting Diodes (LEDs) do not change color/intensity | Refer to the Pinpoint Test | GO to Pinpoint Test G |
| One or more of the ambient lighting Light Emitting Diodes (LEDs) are inoperative or do not change color/intensity | Refer to the Pinpoint Test | GO to Pinpoint Test I |