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 MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 286 (INTERIOR LIGHTING SYSTEM)DIAGNOSIS AND TESTINGINTERIOR LIGHTINGSYMPTOM CHART

2010 Mercury Mariner Hybrid, AWD

Symptom Chart

2010 Mercury Mariner Hybrid, AWDSECTION Symptom Chart

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the lighting control module (LCM)	Circuitry LCM	REFER to MULTIFUNCTION ELECTRONIC MODULES .
No communication with the driver door module (DDM)	Circuitry DDM	REFER to MULTIFUNCTION ELECTRONIC MODULES .
The interior lamps are inoperative	Fuse Circuitry Door ajar switch(es) DDM LCM	GO to PINPOINT TEST A .
An individual interior lamp is inoperative	Circuitry Interior lamp	GO to PINPOINT TEST B .
The interior lamps stay on continuously	Circuitry Door ajar switch(es) Headlamp switch DDM LCM	GO to PINPOINT TEST C .
The interior lamps do not turn on with one door open	Circuitry Door ajar switch DDM	GO to PINPOINT TEST D .
The demand lighting is inoperative	Circuitry LCM	GO to PINPOINT TEST E .
An individual demand lamp is inoperative	Circuitry Interior lamp	GO to PINPOINT TEST F .
The battery saver does not deactivate after timeout	Circuitry LCM	GO to PINPOINT TEST G .
The luggage compartment lamp is inoperative	Circuitry Lamp Luggage compartment lid release solenoid/ajar switch LCM	GO to PINPOINT TEST H .
The interior lamps are inoperative from the headlamp switch	Circuitry Headlamp switch LCM	GO to PINPOINT TEST I .
The illuminated entry is inoperative when using the remote transmitter	Circuitry DDM	GO to MULTIFUNCTION ELECTRONIC MODULES .

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.