Ford Taurus Service Manual: Diagnosis and Testing

Exterior Lighting

DTC Charts

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

BCM DTC Chart

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SCCM DTC Chart

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IPM-A DTC Chart

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RFA Module DTC Chart

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Symptom Charts

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Symptom Chart: Headlamps

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Symptom Chart: Daytime Running Lamps (DRL)

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Symptom Chart: Autolamps

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Symptom Chart: Stoplamps

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Symptom Chart: Turn Signal And Hazard Lamps

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Symptom Chart: Parking, Rear And License Plate Lamps

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Symptom Chart: Reversing Lamps

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DIAGNOSTIC ROUTINES

Pinpoint Test A: One Or Both Low Beams Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85, Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Low Beams in Headlamps.

Refer to Component Description - Headlamp Assembly in Headlamps.

Refer to Component Description - Ballast in Headlamps.

DTC Fault Trigger Conditions

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    Possible Sources
  • BCM fuses 17 (10A) (left low beam) and 16 (10A) (right low beam)
  • BJB fuses 57 (20A) (left ballast) and 78 (20A) (right ballast)
  • Bulb
  • Wiring, terminals or connectors
  • Ballast
  • Headlamp assembly
  • BCM

PINPOINT TEST A: ONE OR BOTH LOW BEAMS ARE INOPERATIVE

NOTE: Due to varying wattage ratings and the resulting current draw differences of certain aftermarket halogen headlamp bulbs, the BCM may activate its short circuit protection strategy, resulting in the low beam output circuit becoming inoperative. Verify the bulbs meet Ford specifications. If the bulbs do not meet Ford specifications, install the correct bulbs. Run the self-test (required to clear certain DTCs and reset the BCM ). Correct any unresolved DTCs. Clear all DTCs. Test the system for normal operation.

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Pinpoint Test B: One or Both High Beams are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85, Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - High Beams in Headlamps.

Refer to Component Description - Headlamp Assembly in Headlamps.

DTC Fault Trigger Conditions

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    Possible Sources
  • BCM fuse 39 (15A)
  • Wiring, terminals or connectors
  • Multifunction switch
  • Headlamp assembly
  • SCCM
  • BCM

PINPOINT TEST B: ONE OR BOTH HIGH BEAMS ARE INOPERATIVE

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Pinpoint Test C: The Low Beams Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85, Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Low Beams in Headlamps.

Refer to Component Description - Ballast in Headlamps.

    Possible Sources
  • Wiring, terminals or connectors
  • Headlamp switch
  • Headlamp assembly
  • SCCM
  • BCM

PINPOINT TEST C: THE LOW BEAMS ARE ON CONTINUOUSLY

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Pinpoint Test D: The High Beams Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85, Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - High Beams in Headlamps.

Refer to Component Description - Headlamp Assembly in Headlamps.

DTC Fault Trigger Conditions

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    Possible Sources
  • Wiring, terminals or connectors
  • Multifunction switch
  • Headlamp assembly
  • SCCM
  • BCM

PINPOINT TEST D: THE HIGH BEAMS ARE ON CONTINUOUSLY

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Pinpoint Test E: The Flash-To-Pass Feature Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Normal Operation and Fault Conditions

Refer to System Operation - Flash-To-Pass in Headlamps.

    Possible Sources
  • Multifunction switch
  • SCCM

PINPOINT TEST E: THE FLASH-TO-PASS FEATURE IS INOPERATIVE

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Pinpoint Test F: The Automatic High Beam Feature Is Inoperative

Refer to Wiring Diagrams Cell 85, Headlamps/Autolamps for schematic and connector information.

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Normal Operation and Fault Conditions

The IPM-A controls the automatic high beam feature when active. The IPM-A turns the high beam headlamps on when the following conditions are met:

  • The feature has been enabled using the message center
  • The autolamps feature has turned the exterior lamps on
  • The fog lamps are off
  • The vehicle speed is greater than 51 km/h (32 mph)
  • The IPM-A determines the ambient lighting conditions are dark enough
  • The IPM-A does not detect any light source that can be interpreted as an illuminated vehicle lamp

The IPM-A turns the high beams off if any of the following occur:

  • The IPM-A detects any light source that can be interpreted as an illuminated vehicle lamp
  • The IPM-A determines the ambient lighting conditions are not dark enough
  • The vehicle speed falls below 44 km/h (27 mph)
  • The fog lamps are turned on
  • The autolamps are turned off
  • The IPM-A determines the view is blocked

DTC Fault Trigger Conditions

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    Possible Sources
  • Windshield debris
  • IPM-A (part of the interior rear view mirror)

PINPOINT TEST F: THE AUTOMATIC HIGH BEAM FEATURE IS INOPERATIVE

NOTE: In cold weather conditions (4º C [40º F] or less), the auto high beams are inhibited for 10 minutes to allow the camera windshield defrost heater to clear the windshield in front of the auto high beam camera.

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Pinpoint Test G: The Daytime Running Lamps (DRL) Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Normal Operation and Fault Conditions

Refer to System Operation - DRL in Daytime Running Lamps (DRL).

Possible Sources

  • Exterior lighting system input/output
  • Transmission gear input
  • BCM

PINPOINT TEST G: THE DRL ARE INOPERATIVE

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Pinpoint Test H: The Autolamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85, Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Autolamps in Autolamps.

Refer to Component Description - Light Sensor in Autolamps.

    Possible Sources
  • Light sensor
  • BCM

PINPOINT TEST H: THE AUTOLAMPS ARE INOPERATIVE

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Pinpoint Test I: The Autolamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85, Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Autolamps in Autolamps.

Refer to Component Description - Light Sensor in Autolamps.

DTC Fault Trigger Conditions

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    Possible Sources
  • Wiring, terminals or connectors
  • Light sensor
  • Headlamp switch
  • SCCM
  • BCM

PINPOINT TEST I: THE AUTOLAMPS ARE ON CONTINUOUSLY

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Pinpoint Test J: All The Stoplamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Stoplamps in Stoplamps.

Refer to Component Description - Stoplamp Switch in Stoplamps.

    Possible Sources
  • BCM fuse 15 (15A) (stoplamps)
  • BJB fuse 59 (10A) (stoplamp switch)
  • Wiring, terminals or connectors
  • Stoplamp switch
  • BCM

PINPOINT TEST J: ALL THE STOPLAMPS ARE INOPERATIVE

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Pinpoint Test K: One Or More Stoplamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Stoplamps in Stoplamps.

DTC Fault Trigger Conditions

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    Possible Sources
  • Wiring, terminals or connectors
  • Bulb socket
  • Rear lamp assembly
  • High mounted stoplamp
  • BCM

PINPOINT TEST K: ONE OR MORE STOPLAMPS ARE INOPERATIVE

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Pinpoint Test L: The Stoplamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Stoplamps in Stoplamps.

Refer to Component Description - Stoplamp Switch in Stoplamps.

BCM DTC Fault Trigger Conditions

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RFA DTC Fault Trigger Conditions

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    Possible Sources
  • Wiring, terminals or connectors
  • Stoplamp switch
  • RFA module
  • PCM
  • BCM

PINPOINT TEST L: THE STOPLAMPS ARE ON CONTINUOUSLY

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Pinpoint Test M: The Turn Signal Function Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Turn Signals in Turn Signal and Hazard Lamps.

DTC Fault Trigger Conditions

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    Possible Sources
  • Multifunction switch
  • SCCM

PINPOINT TEST M: THE TURN SIGNAL FUNCTION IS INOPERATIVE

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Pinpoint Test N: One Turn Signal Lamp Is Inoperative/Always On

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Turn Signals in Turn Signal and Hazard Lamps.

DTC Fault Trigger Conditions

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    Possible Sources
  • BCM fuses 14 (10A) (left turn lamps) and 13 (15A) (right turn lamps)
  • Bulb socket
  • BCM

PINPOINT TEST N: ONE TURN SIGNAL LAMP IS INOPERATIVE/ALWAYS ON

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Pinpoint Test O: The Hazard Lamp Function Is Inoperative/Always On

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Hazard Lamps in Turn Signal and Hazard Lamps.

BCM DTC Fault Trigger Conditions

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    Possible Sources
  • Wiring, terminals or connectors
  • FCIM
  • BCM

PINPOINT TEST O: THE HAZARD LAMP FUNCTION IS INOPERATIVE/ALWAYS ON

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Pinpoint Test P: One Or More Parking, Rear or License Plate Lamps Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 92, Parking, Rear and License Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Parking Lamps in Parking, Rear and License Plate Lamps.

    Possible Sources
  • BCM fuses 30 (15A) (front parking lamps) and 40 (10A) (rear parking lamps)
  • Wiring, terminals or connectors
  • Bulb socket
  • Headlamp assembly
  • Rear lamp assembly
  • BCM

PINPOINT TEST P: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS IS INOPERATIVE

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Pinpoint Test Q: The Parking, Rear Or License Plate Lamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 92, Parking, Rear and License Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Parking Lamps in Parking, Rear and License Plate Lamps.

    Possible Sources
  • Wiring, terminals or connectors
  • BCM

PINPOINT TEST Q: THE PARKING, REAR OR LICENSE PLATE LAMPS ARE ON CONTINUOUSLY

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Pinpoint Test R: All The Reversing Lamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 93, Reversing Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation, Reversing Lamps in Reversing Lamps.

DTC Fault Trigger Conditions

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    Possible Sources
  • BCM fuse 15 (15A)
  • Wiring, terminals or connectors
  • Transmission gear input
  • BCM

PINPOINT TEST R: ALL THE REVERSING LAMPS ARE INOPERATIVE

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Pinpoint Test S: An Individual Reversing Lamp Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 93, Reversing Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation, Reversing Lamps in Reversing Lamps.

    Possible Sources
  • Wiring, terminals or connectors
  • Bulb socket

PINPOINT TEST S: AN INDIVIDUAL REVERSING LAMP IS INOPERATIVE

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Pinpoint Test T: The Reversing Lamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 93, Reversing Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation, Reversing Lamps in Reversing Lamps.

DTC Fault Trigger Conditions

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    Possible Sources
  • Wiring, terminals or connectors
  • Transmission gear input
  • BCM

PINPOINT TEST T: THE REVERSING LAMPS ARE ON CONTINUOUSLY

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    Specifications, Description and Operation
    SPECIFICATIONS Torque Specifications DESCRIPTION AND OPERATION Headlamps Overview The headlamp system consists of: Headlamp assemblies Ballasts ( HID only) Headlamp switch Multifunctio ...

    General Procedures
    Headlamp Adjustment Special Tool(s) Headlamp Adjustment Screw Location Headlamp Aiming The headlamp aiming procedure depends on what type of beam pattern the headlamp is equipped with. Vehicles ...

    Other materials:

    Steering
    Electric Power Steering WARNING: The electric power steering system has diagnostic checks that continuously monitor the system to ensure proper operation. When a system error is detected a steering message will appear in the information display. WARNING: The electric power steering system has d ...

    Fuel Charging and Controls - Turbocharger, 3.5L GTDI
    SPECIFICATIONS Material Torque Specifications a Refer to the procedure in this section. DESCRIPTION AND OPERATION Turbocharger NOTICE: Whenever turbocharger air intake system components are removed, always cover open ports to protect from debris. It is important that no foreign materia ...

    Tire Pressure Monitoring System (TPMS)
    WARNING: The tire pressure monitoring system is NOT a substitute for manually checking tire pressure. The tire pressure should be checked periodically (at least monthly) using a tire gauge. See Inflating Your Tires in this chapter. Failure to properly maintain your tire pressure could increase ...