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 MANUALSFORD2005TAURUS SEL, 4D SEDANREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 382 (EXTERIOR LIGHTING SYSTEM)DIAGNOSIS AND TESTINGAUTOLAMPSSYMPTOM TABLE

2005 Ford Taurus SEL, 4D Sedan

Symptom Table

2005 Ford Taurus SEL, 4D SedanSECTION Symptom Table

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

AUTOLAMPS SYMPTOM TABLE

Condition	Possible Sources	Action
No communication with the smart junction box (SJB)	Circuitry SJB	REFER to MULTIFUNCTION ELECTRONIC MODULES .
The autolamps are inoperative	Circuitry Light sensor Multifunction switch SJB	GO to PINPOINT TEST H .
The autolamps are on continuously	Circuitry Light sensor Multifunction switch SJB	GO to PINPOINT TEST I .
The autolamp time delay is inoperative	SJB	CHECK the SJB configuration and make sure the autolamp feature and time delay are configured correctly. If the SJB is configured correctly, INSTALL a new SJB. REFER to SMART JUNCTION BOX (SJB) . If the SJB is not configured correctly, RECONFIGURE the SJB. TEST the system for normal operation.
The headlamps are inoperative with autolamps on	SJB	PLACE the multifunction switch in the headlamps ON position and OBSERVE the headlamps. If the headlamps illuminate, INSTALL a new SJB. REFER to SMART JUNCTION BOX (SJB) . If the headlamps do not illuminate, REFER to HEADLAMPS to continue diagnosis of the headlamps.
The parking lamps are inoperative with autolamps on	SJB	PLACE the multifunction switch in the parking lamps ON position and OBSERVE the parking lamps. If the parking lamps illuminate, INSTALL a new SJB. REFER to SMART JUNCTION BOX (SJB) . If the parking lamps do not illuminate, REFER to PARKING, REAR AND LICENSE PLATE LAMPS to continue diagnosis of the parking lamps.

RENDER: 1.0x

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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.