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Pinpoint Test D: The Headlamp(S) Are On Continuously

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: The battery ground cable must be disconnected for accurate test results when checking ground circuits for continuity to ground.
  1. D1 VERIFY THE HEADLAMP OPERATION 
    • Key in ON position.
    • Are the high beam headlamps illuminated? 
    1. YES  : Go to  D13.
    2. NO  : Go to  D2.
  2. D2 CHECK THE SJB HEADLAMP SWITCH PIDs 
    • Enter the following diagnostic mode on the diagnostic tool: SJB Data Logger
      • NOTE: Make sure the headlamp switch is lined up in the correct position when monitoring the PIDs.
    • Monitor the SJB headlamp switch PIDs (HD_LMP_S2 and HEAD_L) while moving the headlamp switch through all positions. Refer to the following chart.
      Headlamp Switch Position HD_LMP_S2 Expected Value HEAD_L Expected Value
      Autolamps AUTOLAMP OFF
      OFF - OFF
      Parklamps - -
      Headlamp - HEADLAMP
    • Do the headlamp switch positions agree with the PIDs? 
    1. YES  : Go to  D9.
    2. NO  : Go to  D3.
  3. D3 CHECK THE HEADLAMP SWITCH 
    • Key in OFF position.
    • Disconnect: Headlamp Switch C205
    • Carry out the headlamp switch component test. Refer to COMPONENT TESTING.
    • Is the headlamp switch OK? 
    1. YES  : Go to  D4.
    2. NO  : INSTALL a new headlamp switch. REFER to Headlamp Switch  in this. CLEAR the DTCs. REPEAT the self-test.
  4. D4 CHECK FOR CONTINUITY TO GROUND FROM THE HEADLAMP SWITCH 
      Fig 1: Checking Circuit GD116 (BK/VT) For Open (Headlamp Switch)
      GF0030469Courtesy of FORD MOTOR CO.
    • Measure the resistance between the headlamp switch C205-1, circuit GD116 (BK/VT), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  D7.
    2. NO  : Go to  D5.
  5. D5 CHECK CIRCUIT GD116 (BK/VT) FOR AN OPEN (JOINT CONNECTOR TO GROUND) 
    • Disconnect: Joint Connector 6 C2365
      • Fig 2: Measuring Resistance Between Joint Connector 6 C2365-A, Circuit GD116 (BK/VT) & Ground
      GF0032271Courtesy of FORD MOTOR CO.
    • Measure the resistance between the joint connector 6 C2365-A, circuit GD116 (BK/VT), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  D6.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  6. D6 CHECK CIRCUIT GD116 (BK/VT) FOR AN OPEN (HEADLAMP SWITCH TO JOINT CONNECTOR) 
      Fig 3: Measuring Resistance Between Headlamp Switch C205-1, Circuit GD116 (BK/VT) & Joint Connector 6 C2365-J
      GF0032272Courtesy of FORD MOTOR CO.
    • Measure the resistance between the headlamp switch C205-1, circuit GD116 (BK/VT), harness side and joint connector 6 C2365-J, circuit GD116 (BK/VT), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new joint connector. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  7. D7 CHECK THE HEADLAMP SWITCH INPUT CIRCUITS FOR A SHORT TO GROUND 
    • Disconnect: SJB C2280b
      • Fig 4: Measuring Resistance Between Headlamp Switch, Harness Side & Ground
      GF0032273Courtesy of FORD MOTOR CO.
    • Measure the resistance between the headlamp switch, harness side and ground as follows:
      Connector-Pin Circuit
      C205-9 (if equipped with autolamps) CLF19 (VT/GN)
      C205-8 CLF18 (BU/WH)
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  D8.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  8. D8 CHECK THE HEADLAMP SWITCH INPUT CIRCUITS FOR AN OPEN 
      Fig 5: Measuring Resistance Between Headlamp Switch, Harness Side & SJB
      GF0032274Courtesy of FORD MOTOR CO.
    • Measure the resistance between the headlamp switch, harness side and the SJB, harness side as follows:
      Headlamp Switch Connector-Pin SJB Connector-Pin Circuit
      C205-9 (if equipped with autolamps) C2280b-50 CLF19 (VT/GN)
      C205-4 C2280b-47 CLF23 (WH/VT)
      C205-3 C2280b-31 CLS34 (GY)
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  D16.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  9. D9 CHECK FOR SJB DTC B2008 
    • Check the recorded results from the SJB self-test.
    • Is DTC B2008 present? 
    1. YES  : Go to  D10.
    2. NO  : Go to  D12.
  10. D10 CHECK THE WINDSHIELD WIPER MOTOR 
    • Key in OFF position.
    • Disconnect: Windshield Wiper Motor C1552
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: SJB Self-Test
    • Repeat the SJB self-test.
    • Is DTC B2008 still present? 
    1. YES  : Go to  D11.
    2. NO  : INSTALL a new windshield wiper motor. REFER to WIPERS AND WASHERS . TEST the system for normal operation.
  11. D11 CHECK CIRCUIT CRW01 (WH) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: SJB C2280f
      • Fig 6: Measuring Resistance Between Windshield Wiper Motor C1552-2, Circuit CRW01 (WH) & Ground
      GF0014546Courtesy of FORD MOTOR CO.
    • Measure the resistance between the windshield wiper motor C1552-2, circuit CRW01 (WH), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  D16.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  12. D12 CHECK THE SJB OUTPUT 
    • Disconnect: SJB C2280e
    • Does the LH or RH headlamp continue to illuminate? 
    1. YES  : REPAIR circuit CLF04 (BN/BU) (LH headlamp) or circuit CLF05 (BU/GN) (RH headlamp) for a short to voltage as necessary. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  D16.
  13. D13 CHECK CIRCUIT CLF08 (YE/VT) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: SJB C2280e
    • Key in ON position.
    • Do the high beams continue to illuminate? 
    1. YES  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  D14.
  14. D14 CHECK THE MULTIFUNCTION SWITCH 
    • Key in OFF position.
    • Connect: SJB C2280e
    • Disconnect: Multifunction Switch C202
    • Key in ON position.
    • Do the high beams continue to illuminate? 
    1. YES  : Go to  D15.
    2. NO  : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . CLEAR the DTCs. REPEAT the self-test.
  15. D15 CHECK CIRCUIT CLF17 (WH/OG) (HIGH BEAM) OR CIRCUIT CLF27 (GN/BN) (FLASH-TO-PASS) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: SJB C2280b
      • Fig 7: Measuring Resistance Between Multifunction Switch C202-6 & C202-4, circuit CLF17 (WH/OG) & CLF27 (GN/BN)
      GF0023438Courtesy of FORD MOTOR CO.
    • Measure the resistance between the multifunction switch C202-6, circuit CLF17 (WH/OG), harness side and ground; and between the multifunction switch C202-4, circuit CLF27 (GN/BN), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  D16.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  16. D16 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 . 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. CLEAR the DTCs. REPEAT the self-test.
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