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 665 (INTERIOR LIGHTING)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 Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. 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 smart junction box (SJB)	Circuitry SJB	REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES .
The courtesy lamps are inoperative	Fuse Circuitry SJB	GO to PINPOINT TEST A .
An individual courtesy lamp is inoperative	Circuitry Interior lamp	GO to PINPOINT TEST B .
The courtesy lamps stay on continuously	Circuitry Door ajar switch Luggage compartment lid ajar switch Dimmer control switch SJB	GO to PINPOINT TEST C .
The courtesy lamps do not turn on with one door open	Circuitry Door ajar switch Luggage compartment lid ajar switch SJB	GO to PINPOINT TEST D .
The demand lamps are inoperative	Circuitry SJB	GO to PINPOINT TEST E .
An individual demand lamp is inoperative	Circuitry Interior lamp	GO to PINPOINT TEST F .
The illuminated entry is inoperative when using the remote keyless entry (RKE) transmitter	RKE system SJB	GO to PINPOINT TEST G .
The battery saver does not deactivate after time-out	Circuitry SJB	GO to PINPOINT TEST H .
The puddle lamps are inoperative	Circuitry Exterior mirror	GO to PINPOINT TEST I .
The courtesy lamps are inoperative from the dimmer control switch	Circuitry Dimmer control switch SJB	GO to PINPOINT TEST J .

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.