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Home >> Ford >> 2005 >> Escape Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1611 (Exterior Lighting System) >> Diagnosis And Testing >> Headlamps >> Pinpoint Tests >> Pinpoint Test D: The Low Beam(s) Are Always On >> Pinpoint Test D: The Low Beam(S) Are Always On

Pinpoint Test D: The Low Beam(S) Are Always On

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. D1 CHECK FOR AUTOLAMP DTCs 
    • Review the DTCs retrieved from the SJB self-test.
    • Is DTC B1696, B1791, B1793 or B2008 present? 
    1. Yes  : REFER to AUTOLAMPS  in this service information.
    2. No  : If equipped with autolamps, GO to D2.

      If not equipped with autolamps, GO to  D3.

  2. D2 CHECK THE SJB AUTOLAMP ON REQUEST PID 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: SJB DataLogger.
    • While placing the headlamp switch in the AUTOLAMPS ON and then OFF position, monitor the SJB headlamp switch PID (HDLMP_AUT_CKT).
    • Does the PID indicate ON with the headlamp switch in the AUTOLAMPS ON position and OFF when the headlamp switch is in the OFF position? 
    1. Yes  : GO to D3.
    2. No  : GO to PINPOINT TEST H .
  3. D3 CHECK THE SJB HEADLAMP SWITCH PIDs 
    NOTE: Make sure the headlamp switch is lined up in the correct position when monitoring the PIDs.
    • Enter the following diagnostic mode on the scan tool: SJB DataLogger.
      • NOTE: Only one PID should indicate ON at each headlamp switch position.
    • While moving the headlamp switch through all positions, monitor the SJB headlamp switch input PIDs (HDLMP_OFF_CKT, HDLMP_PRK_CKT, HDLMP_ON_CKT).
    • Do the headlamp switch positions agree with the PIDs (with only one PID indicating ON in each position)? 
    1. Yes  : GO to  D8.
    2. No  : GO to D4.
  4. D4 CHECK FOR VOLTAGE SIGNALS TO THE HEADLAMP SWITCH 
    • Ignition OFF.
    • Disconnect: Headlamp Switch C205.
    • Measure the voltage between the headlamp switch, harness side and ground as follows:
      HEADLAMP SWITCH CONNECTOR-PIN REFERENCE TABLE

      Headlamp Switch Connector-Pin Circuit
      C205-6 CLF23 (WH/VT)
      C205-2 CLS34 (GY)
      C205-7 CLF18 (BU/WH)
      Fig 1: Measuring Voltage Between Headlamp Switch, Harness Side And Ground
      G06141776Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    1. Yes  : GO to D5.
    2. No  : GO to  D6.
  5. D5 CHECK FOR VOLTAGE TO THE HEADLAMP SWITCH USING THE CONNECTOR GROUND 
    • Measure the voltage between the headlamp switch C205-6, circuit CLF23 (WH/VT), harness side and the headlamp switch C205-3, circuit GD116 (BK/VT), harness side.
      Fig 2: Measuring Voltage Between Headlamp Switch C205-6, Circuit CLF23 (WH/VT) And Headlamp Switch C205-3, Circuit GD116 (BK/VT)
      G06141777Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : INSTALL a new headlamp switch. REFER to HEADLAMP SWITCH  in this service information. TEST the system for normal operation.
    2. No  : REPAIR circuit GD116 (BK/VT) for an open. TEST the system for normal operation.
  6. D6 CHECK THE HEADLAMP SWITCH INPUT CIRCUITS FOR A SHORT TO GROUND 
    • Disconnect: SJB C2280b.
    • Measure the resistance between the headlamp switch, harness side and ground as follows:
      HEADLAMP SWITCH CONNECTOR-PIN REFERENCE TABLE

      Headlamp Switch Connector-Pin Circuit
      C205-6 CLF23 (WH/VT)
      C205-2 CLS34 (GY)
      C205-7 CLF18 (BU/WH)
      Fig 3: Measuring Resistance Between Headlamp Switch, Harness Side And Ground
      G06065222Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    1. Yes  : GO to D7.
    2. No  : REPAIR the circuit in question for a short to ground. TEST the system for normal operation.
  7. D7 CHECK THE HEADLAMP SWITCH INPUT CIRCUITS FOR AN OPEN 
    • Measure the resistance between the headlamp switch, harness side and the SJB, harness side as follows:
      CONNECTOR PIN REFERENCE TABLE

      Headlamp Switch Connector-Pin SJB Connector-Pin Circuit
      C205-6 C2280b-47 CLF23 (WH/VT)
      C205-2 C2280b-31 CLF34 (YE/OG)
      C205-7 C2280b-30 CLF18 (BU/WH)
      Fig 4: Measuring Resistance Between Headlamp Switch, Harness Side And SJB, Harness Side
      G06065223Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : GO to  D11.
    2. No  : REPAIR the circuit in question for an open. TEST the system for normal operation.
  8. D8 CHECK THE SJB OUTPUT 
    • Disconnect: SJB C2280e.
    • Does the LH or RH headlamp continue to illuminate? 
    1. Yes  : For MKZ with halogen headlamps or Fusion, REPAIR circuit CLF04 (BN/BU) (LH headlamp) or circuit CLF05 (BU/GN) (RH headlamp) for a short to voltage. TEST the system for normal operation.

      For MKZ with HID headlamps or Milan, GO to D9.

    2. No  : GO to  D11.
  9. D9 CHECK THE HEADLAMP RELAY OUTPUT CIRCUIT 
    • Disconnect: Suspect Headlamp Relay.
    • Does the LH or RH headlamp continue to illuminate? 
    1. Yes  : REPAIR circuit CLF30 (VT/BN) (LH headlamp) or circuit CLF31 (YE/GY) (RH headlamp) for a short to voltage. TEST the system for normal operation.
    2. No  : GO to D10.
  10. D10 CHECK HEADLAMP RELAY 
    • Substitute a known good relay.
    • Does the LH or RH headlamp continue to illuminate? 
    1. Yes  : REMOVE the known good relay. TEST the system for normal operation.
    2. No  : REMOVE the known good relay. GO to D11.
  11. D11 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all the SJB connectors.
    • Check for:
      • corrosion
      • damaged pins
      • 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? 
    1. Yes  : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
    2. No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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