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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 546 (Exterior Lighting System) >> Diagnosis And Testing >> Headlamps >> Pinpoint Tests >> Pinpoint Test F: The Headlamps Are On Continuously >> Pinpoint Test F: The Headlamps Are On Continuously

Pinpoint Test F: The Headlamps Are On Continuously

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.
  1. F1 VERIFY THE HEADLAMP OPERATION 
    • Key in OFF position.
      • NOTE: Make sure the multifunction switch is in the LOW BEAM position.
    • Make sure the multifunction switch is in the OFF position.
    • Are the low beam headlamps illuminated? 

    Yes:  If equipped with autolamps, GO to  F2.

    If not equipped with autolamps, GO to  F3.

    No:  GO to  F6.

  2. F2 CHECK THE AUTOLAMP SYSTEM 
    • Observe the parking lamps.
    • Are the parking lamps illuminated with the headlamps? 

    Yes:  REFER to AUTOLAMPS  to diagnose the autolamp system.

    No:  GO to  F3.

  3. F3 CHECK THE MULTIFUNCTION SWITCH (LOW BEAM) 
    • Disconnect: Multifunction Switch C2080.
    • Do the headlamps continue to illuminate? 

    Yes:  GO to  F4.

    No:  INSTALL a new multifunction switch. REFER to REMOVAL AND INSTALLATION . CLEAR the DTCs. REPEAT the self-test.

  4. F4 CHECK CIRCUITS 160 (DB/WH) AND 161 (DG/OG) FOR A SHORT TO VOLTAGE 
    • Disconnect: SJB C2280b.
    • Does the LH or RH headlamp continue to illuminate? 

    Yes:  REPAIR circuit 160 (DB/WH) (LH headlamp) or 161 (DG/OG) (RH headlamp) as necessary. CLEAR the DTCs. REPEAT the self-test.

    No:  GO to  F5.

  5. F5 CHECK CIRCUIT 1033 (RD/YE) FOR A SHORT TO GROUND 
    • Disconnect: SJB C2280e.
    • Measure the resistance between the multifunction switch C2080-13, circuit 1033 (RD/YE), harness side and ground.
      Fig 1: Checking Circuit 1033 (RD/YE) For A Short To Ground
      G04621957Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes:  GO to  F9.

    No:  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  6. F6 CHECK THE MULTIFUNCTION SWITCH (HIGH-BEAM) 
    • Disconnect: Multifunction Switch C2080.
    • Do the headlamps continue to illuminate? 

    Yes:  GO to  F7.

    No:  INSTALL a new multifunction switch. REFER to STEERING COLUMN MULTIFUNCTION SWITCH . CLEAR the DTCs. REPEAT the self-test.

  7. F7 CHECK CIRCUITS 1724 (WH/LG) AND 1779 (DB/LG) FOR A SHORT TO VOLTAGE 
    • Disconnect: SJB C2280b.
    • Does the LH or RH headlamp continue to illuminate? 

    Yes:  REPAIR circuit 1724 (WH/LG) (LH headlamp) or 1779 (DB/LG) (RH headlamp) as necessary. CLEAR the DTCs. REPEAT the self-test.

    No:  GO to  F8.

  8. F8 CHECK CIRCUITS 12 (LG/BK) AND 196 (DB/OG) FOR A SHORT TO GROUND 
    • Disconnect: SJB C2280e.
    • Measure the resistance between the multifunction switch C2080-2, circuit 12 (LG/BK), harness side and ground; and between the multifunction switch C2080-1, circuit 196 (DB/OG), harness side and ground.
      Fig 2: Checking Circuits 12 (LG/BK) & 196 (DB/OG) For A Short To Ground
      G04621958Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 

    Yes:  GO to  F9.

    No:  REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.

  9. F9 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all the SJB connectors.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect all the SJB connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 

    Yes:  INSTALL a new SJB. REFER to SMART JUNCTION BOX (SJB) . TEST the system for normal operation.

    No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

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