Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSFORD2009FUSION SEL, 3.0 1, FWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1868 (INTERIOR LIGHTING SYSTEM)DIAGNOSIS AND TESTINGINTERIOR LIGHTINGSYMPTOM CHART

2009 Ford Fusion SEL, 3.0 1, FWD

Symptom Chart

2009 Ford Fusion SEL, 3.0 1, FWDSECTION Symptom Chart

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
The courtesy lamps flash on and off	Smart Junction Box (SJB) is not configured correctly	CONFIGURE the SJB. REFER to MODULE CONFIGURATION -- FUSION MILAN & MKZ article. TEST the system for normal operation.
The courtesy lamps do not illuminate with a door open	Wiring, terminals or connectors Door ajar switch SJB	GO to PINPOINT TEST A .
The courtesy lamps do not illuminate from the instrument panel dimmer switch	Wiring, terminals or connectors Instrument panel dimmer switch SJB	GO to PINPOINT TEST B .
The interior courtesy lamp(s) are inoperative	Fuse Wiring, terminals or connectors SJB	GO to PINPOINT TEST C .
The puddle lamp(s) are inoperative	Wiring, terminals or connectors Exterior mirror	GO to PINPOINT TEST D .
The luggage compartment lamp is inoperative/always on	Wiring, terminals or connectors Luggage compartment lamp Luggage compartment lid latch	GO to PINPOINT TEST E .
The interior courtesy lamps stay on continuously	Wiring, terminals or connectors Door ajar switch SJB	GO to PINPOINT TEST F .
The puddle lamps stay on continuously	Wiring, terminals or connectors SJB	GO to PINPOINT TEST G .
All the demand lamps are inoperative	Wiring, terminals or connectors SJB	GO to PINPOINT TEST H .
An individual demand lamp is inoperative	Wiring, terminals or connectors Interior lamp	GO to PINPOINT TEST I .
The battery saver does not deactivate after time-out	Wiring, terminals or connectors SJB	GO to PINPOINT TEST J .
The ambient lighting is inoperative - Fusion/Milan	Wiring, terminals or connectors Ambient lighting switch (part of the traction control switch) Ambient lighting module	GO to PINPOINT TEST K .
An individual ambient lighting LED is inoperative/does not operate correctly	Ambient lighting harness	NOTE: The LEDs are not serviceable separate from the harness. INSTALL a new ambient lighting harness in question. TEST the system for normal operation.
The ambient lighting does not cycle through all color combinations - Fusion/Milan	Wiring, terminals or connectors Ambient lighting switch (part of the traction control switch) Ambient lighting module	GO to PINPOINT TEST L .
The ambient lighting is inoperative - MKZ	Wiring, terminals or connectors Ambient lighting select switch Interior Lighting Control Module (ILCM)	GO to PINPOINT TEST M .
The ambient lighting does not cycle through all color combinations - MKZ	Wiring, terminals or connectors Ambient lighting switch ILCM	GO to PINPOINT TEST N .
The ambient lighting does not cycle through brightness settings - MKZ	Wiring, terminals or connectors Ambient lighting dimmer switch ILCM	GO to PINPOINT TEST O .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.