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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1694 (Exterior Lighting System) >> Diagnosis And Testing >> Headlamps >> Pinpoint Tests >> Pinpoint Test B: One Low Beam Headlamp Is Inoperative >> Pinpoint Test B: One Low Beam Headlamp Is Inoperative

Pinpoint Test B: One Low Beam Headlamp Is Inoperative

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.
NOTE: Due to varying wattage ratings and resulting current draw of certain aftermarket headlamp bulbs, the SJB may activate its short circuit protection strategy, resulting in the low beam output circuit(s) becoming inoperative. Verify that the bulbs meet Ford specifications. If the bulbs do not meet Ford specifications, install the correct bulbs. Clear the DTCs and run the on-demand self-test (required to reset the SJB). Correct any unresolved DTCs. Test the system for normal operation.
  1. B1 CHECK FOR VOLTAGE TO THE HEADLAMP 
    • Ignition OFF.
    • Disconnect: Inoperative Headlamp.
    • Place the headlamp switch in the HEADLAMPS ON position.
    • For Fusion or MKZ with halogen headlamps, measure the voltage between the LH headlamp C1021-6, circuit CLF04 (BN/BU), harness side and ground; or between the RH headlamp C1041-6, circuit CLF05 (BU/GN), harness side and ground.
      Fig 1: Measuring Voltage Between LH Headlamp C1284-7, Circuit CLF08 (YE/VT) And Ground
      G06133749Courtesy of FORD MOTOR CO.
    • For Milan or MKZ with HID headlamps, measure the voltage between the LH headlamp C1021-6, circuit CLF30 (VT/BN), harness side and ground; or between the RH headlamp C1041-6, circuit CLF31 (YE/GY), harness side and ground.
      Fig 2: Measuring Voltage Between LH Headlamp C1021-6, Circuit CLF30 (VT/BN) And Ground
      G06133749Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to B2.
    2. No  : For MKZ with halogen headlamps or Fusion, GO to  B5.

      For MKZ with HID headlamps or Milan, GO to  B10.

  2. B2 CHECK FOR VOLTAGE TO THE HEADLAMP USING THE CONNECTOR GROUND 
    • For Fusion or MKZ with halogen headlamps, measure the voltage between the LH headlamp C1021-6, circuit CLF04 (BN/BU), harness side and the LH headlamp C1021-1, circuit GD121 (BK/YE), harness side; or between the RH headlamp C1041-6, circuit CLF05 (BU/GN), harness side and the RH headlamp C1041-1, circuit GD123 (BK/GY), harness side.
      Fig 3: Measuring Voltage Between LH Headlamp C1021-6, Circuit CLF04 (BN/BU) And LH Headlamp C1021-1, Circuit GD121 (BK/YE)
      G06257267Courtesy of FORD MOTOR CO.
    • For Milan, measure the voltage between the LH headlamp C1021-6, circuit CLF30 (VT/BN), harness side and the LH headlamp C1021-4, circuit GD121 (BK/YE), harness side; or between the RH headlamp C1041-6, circuit CLF31 (YE/GY), harness side and the RH headlamp C1041-4, circuit GD123 (BK/GY), harness side.
      Fig 4: Measuring Voltage Between LH Headlamp C1021-6, Circuit CLF30 (VT/BN) And LH Headlamp C1021-4, Circuit GD121 (BK/YE)
      G06257268Courtesy of FORD MOTOR CO.
    • For MKZ with HID headlamps, measure the voltage between the LH headlamp C1021-6, circuit CLF30 (VT/BN), harness side and the LH headlamp C1021-1, circuit GD121 (BK/YE), harness side; or between the RH headlamp C1041-6, circuit CLF31 (YE/GY), harness side and the RH headlamp C1041-1, circuit GD123 (BK/GY), harness side.
      Fig 5: Measuring Voltage Between LH Headlamp C1021-6, Circuit CLF30 (VT/BN) And LH Headlamp C1021-1, Circuit GD121 (BK/YE)
      G06257267Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : For MKZ with HID headlamps, GO to B3.

      For all others, REPAIR or INSTALL a new headlamp assembly. REFER to HEADLAMP ASSEMBLY  in this service information. TEST the system for normal operation.

    2. No  : REPAIR circuit GD121 (BK/YE) (LH headlamp) or circuit GD123 (BK/GY) for an open. TEST the system for normal operation.
  3. B3 SUBSTITUTE THE HID BULB 
    • Place the headlamp switch in the OFF position.
    • Substitute a known good HID bulb.
    • Place the headlamp switch in the HEADLAMPS ON position.
    • Does the headlamp illuminate? 
    1. Yes  : INSTALL a new HID headlamp bulb. REFER to HEADLAMP BULB - LH, MKZ  or HEADLAMP BULB - RH, MKZ  in this service information. TEST the system for normal operation.
    2. No  : REINSTALL the HID bulb. GO to B4.
  4. B4 SUBSTITUTE THE BALLAST 
    • Place the headlamp switch in the OFF position.
    • Substitute a known good ballast.
    • Place the headlamp switch in the HEADLAMPS ON position.
    • Does the headlamp illuminate? 
    1. Yes  : INSTALL a new ballast. REFER to BALLAST  in this service information. TEST the system for normal operation.
    2. No  : INSTALL a new headlamp assembly. REFER to HEADLAMP ASSEMBLY  in this service information. TEST the system for normal operation.
  5. B5 USE THE RECORDED DTCs FROM THE SJB SELF-TEST 
    • Place the headlamp switch in the OFF position.
    • Check the recorded results from the SJB self-test.
    • Is DTC B2A2E or DTC B2A30 present? 
    1. Yes  : GO to B6.
    2. No  : VERIFY the SJB fuse 7 (10A) (LH low beam) or fuse 8 (10A) (RH low beam) is OK. If OK, GO to  B7. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. After the repair:

      If no DTCs are present, TEST the system for normal operation.

      If DTC B106E is present, CLEAR the DTCs and  REPEAT the self-test (required to enable the low beam output driver if DTC B106E is present)  . TEST the system for normal operation.

      If DTC B106F is present, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.

  6. B6 CHECK THE SJB HEADLAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN (FUSION OR MKZ WITH HALOGEN HEADLAMPS) 
    • Disconnect: SJB C2280e.
    • Measure the resistance between the LH headlamp C1021-6, circuit CLF04 (BN/BU), harness side and the SJB C2280e-13, circuit CLF04 (BN/BU), harness side; or between the RH headlamp C1041-6, circuit CLF05 (BU/GN), harness side and the SJB C2280e-4, circuit CLF05 (BU/GN), harness side.
      Fig 6: Measuring Resistance Between LH Headlamp C1021-6, Circuit CLF04 (BN/BU) And SJB C2280e-13, Circuit CLF04 (BN/BU)
      G06257270Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : GO to  B21.
    2. No  : REPAIR circuit CLF04 (BN/BU) (LH headlamp) or circuit CLF05 (BU/GN) (RH headlamp) for an open. CLEAR the DTCs. REPEAT the self-test.
  7. B7 ISOLATE THE HEADLAMP AS THE CAUSE OF THE SHORT 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: SJB Self-Test.
    • Clear the DTCs and repeat the on-demand self-test (required to enable the low beam output driver if DTC B106E is present)  .
    • Place the headlamp switch in the HEADLAMPS ON position.
    • Measure the voltage between the LH headlamp C1021-6, circuit CLF04 (BN/BU), harness side and ground; or between the RH headlamp C1041-6, circuit CLF05 (BU/GN), harness side and ground.
      Fig 7: Measuring Voltage Between LH Headlamp C1021-6, Circuit CLF04 (BN/BU), Harness Side And Ground
      G06133749Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to  B9.
    2. No  : GO to B8.
  8. B8 CHECK THE SJB LOW BEAM OUTPUT CIRCUIT FOR A SHORT TO GROUND (FUSION OR MKZ WITH HALOGEN HEADLAMPS) 
    • Ignition OFF.
    • Disconnect: SJB C2280e.
    • Measure the resistance between the LH headlamp C1021-6, circuit CLF04 (BN/BU), harness side and ground; or between the RH headlamp C1041-6, circuit CLF05 (BU/GN), harness side and ground.
      Fig 8: Measuring Resistance Between LH Headlamp C1021-6, Circuit CLF04 (BN/BU), Harness Side And Ground
      G06065219Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes  : GO to  B21.
    2. No  : REPAIR circuit CLF04 (BN/BU) (LH low beam) or circuit CLF05 (BU/GN) (RH low beam) for a short to ground. After the repair:

      If no DTCs are present, TEST the system for normal operation.

      If DTC B106E is present, CLEAR the DTCs and  REPEAT the self-test (required to enable the low beam output driver if DTC B106E is present)  . TEST the system for normal operation.

      If DTC B106F is present, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ . TEST the system for normal operation.

  9. B9 ISOLATE THE HEADLAMP AS THE CAUSE OF THE SHORT (FUSION OR MKZ WITH HID HEADLAMPS) 
    • Ignition ON.
    • Disconnect: Headlamp Bulb.
    • Connect: Headlamp Assembly.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: SJB Self-Test.
    • Clear the DTCs and repeat the on-demand self-test.
    • Is DTC B2A31 (LH headlamp) or DTC B2A2F (RH headlamp) present? 
    1. Yes  : INSTALL a new headlamp assembly. REFER to HEADLAMP ASSEMBLY  in this service information. After the repair: If no DTCs are present, TEST the system for normal operation.

      If DTC B106E is present, CLEAR the DTCs and  REPEAT the self-test (required to enable the low beam output driver if DTC B106E is present)  . TEST the system for normal operation.

      If DTC B106F is present, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.

    2. No  : INSTALL a new headlamp bulb. REFER to HEADLAMP BULB - LH, FUSION , HEADLAMP BULB - RH, FUSION , HEADLAMP BULB - LH, MILAN  or HEADLAMP BULB - RH, MILAN  in this service information. After the repair:

      If no DTCs are present, TEST the system for normal operation.

      If DTC B106E is present, CLEAR the DTCs and  REPEAT the self-test (required to enable the low beam output driver if DTC B106E is present)  . TEST the system for normal operation.

      If DTC B106F is present, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.

  10. B10 CHECK THE HEADLAMP RELAY 
    • Place the headlamp switch in the OFF position.
    • Disconnect: Suspect Headlamp Relay.
    • Substitute a known good relay.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: SJB Self-Test.
    • Clear the DTCs and  repeat the on-demand self-test (required to enable the low beam output driver if DTC B106E is present)  .
    • Place the headlamp switch in the HEADLAMPS ON position.
    • Measure the voltage between the LH headlamp C1021-6, circuit CLF30 (VT/BN), harness side and ground; or between the RH headlamp C1041-6, circuit CLF31 (YE/GY), harness side and ground.
      Fig 9: Measuring Voltage Between LH Headlamp C1021-6, Circuit CLF30 (VT/BN), Harness Side And Ground
      G06133749Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : REMOVE the known good relay. INSTALL a new headlamp relay. TEST the system for normal operation.
    2. No  : For MKZ non-Hybrid or Milan non-Hybrid, REMOVE the known good relay. GO to B11.

      For MKZ Hybrid or Milan Hybrid, REMOVE the known good relay. GO to  B16.

  11. B11 CHECK FOR VOLTAGE TO THE HEADLAMP RELAY 
    • Place the headlamp switch in the OFF position.
    • Ignition OFF.
    • For the LH headlamp, measure the voltage between the LH headlamp relay pin 3, circuit SBB26 (YE/RD), BJB face side and ground.
      Fig 10: Measuring Voltage Between LH Headlamp Relay Pin 3, Circuit SBB26 (YE/RD), BJB Face Side And Ground
      G06257274Courtesy of FORD MOTOR CO.
    • For the RH headlamp, measure the voltage between the RH headlamp relay pin 3, circuit SBB27 (BU/RD), BJB face side and ground.
      Fig 11: Measuring Voltage Between RH Headlamp Relay Pin 3, Circuit SBB27 (BU/RD), BJB Face Side And Ground
      G06257275Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to B12.
    2. No  : VERIFY the BJB fuse 26 (15A) (LH headlamp) or fuse 27 (15A) (RH headlamp) is OK. If OK, REPAIR circuit SBB26 (YE/RD) (LH headlamp) or circuit SBB27 (BU/RD) (RH headlamp) for an open. TEST the system for normal operation. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short.
  12. B12 CHECK FOR VOLTAGE TO THE HEADLAMP RELAY USING THE RELAY GROUND 
    • For the LH headlamp, measure the voltage between the LH headlamp relay pin 3, circuit SBB26 (YE/RD), BJB face side and the LH headlamp relay pin 2, circuit GD121 (BK/YE), BJB face side.
      Fig 12: Measuring Voltage Between LH Headlamp Relay Pin 3, Circuit SBB26 (YE/RD) And LH Headlamp Relay Pin 2, Circuit GD121 (BK/YE)
      G06257276Courtesy of FORD MOTOR CO.
    • For the RH headlamp, measure the voltage between the RH headlamp relay pin 3, circuit SBB27 (BU/RD), BJB face side and the RH headlamp relay pin 2, circuit GD121 (BK/YE), BJB face side.
      Fig 13: Measuring Voltage Between RH Headlamp Relay Pin 3, Circuit SBB27 (BU/RD) And RH Headlamp Relay Pin 2, Circuit GD121 (BK/YE)
      G06257277Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to B13.
    2. No  : REPAIR circuit GD121 (BK/YE) for an open. TEST the system for normal operation.
  13. B13 BYPASS THE HEADLAMP RELAY 
    • Connect: Headlamp Assembly.
    • For the LH headlamp, connect a fused jumper wire between the LH headlamp relay pin 3, circuit SBB26 (YE/RD), BJB face side and the LH headlamp relay pin 5, circuit CLF30 (VT/BN), BJB face side.
      Fig 14: Connecting Fused Jumper Wire Between LH Headlamp Relay Pin 3, Circuit SBB26 (YE/RD) And LH Headlamp Relay Pin 5, Circuit CLF30 (VT/BN)
      G06257278Courtesy of FORD MOTOR CO.
    • For the RH headlamp, connect a fused jumper wire between the RH headlamp relay pin 3, circuit SBB27 (BU/RD), BJB face side and the RH headlamp relay pin 5, circuit CLF31 (YE/GY), BJB face side.
      Fig 15: Connecting Fused Jumper Wire Between RH Headlamp Relay Pin 3, Circuit SBB27 (BU/RD) And RH Headlamp Relay Pin 5, Circuit CLF31 (YE/GY)
      G06257279Courtesy of FORD MOTOR CO.
    • Does the headlamp illuminate? 
    1. Yes  : REMOVE the jumper wire. GO to B14.
    2. No  : REMOVE the jumper wire. REPAIR circuit CLF30 (VT/BN) (LH headlamp) or circuit CLF31 (YE/GY) (RH headlamp) for an open. TEST the system for normal operation.
  14. B14 CHECK THE SJB LOW BEAM OUTPUT CIRCUIT FOR A SHORT TO GROUND (MKZ WITH HID HEADLAMPS OR MILAN) 
    • Disconnect: SJB C2280e.
    • For the LH headlamp, measure the resistance between the LH headlamp relay pin 1, circuit CLF04 (BN/BU), BJB face side and ground.
      Fig 16: Measuring Resistance Between LH Headlamp Relay Pin 1, Circuit CLF04 (BN/BU), BJB Face Side And Ground
      G06257280Courtesy of FORD MOTOR CO.
    • For the RH headlamp, measure the resistance between the RH headlamp relay pin 1, circuit CLF05 (BU/GN), BJB face side and ground.
      Fig 17: Measuring Resistance Between RH Headlamp Relay Pin 1, Circuit CLF05 (BU/GN), BJB Face Side And Ground
      G06257281Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes  : GO to B15.
    2. No  : REPAIR circuit CLF04 (BN/BU) (LH low beam) or circuit CLF05 (BU/GN) (RH low beam) for a short to ground. After the repair:

      If no DTCs are present, TEST the system for normal operation.

      If DTC B106E is present, CLEAR the DTCs and  REPEAT the self-test (required to enable the low beam output driver if DTC B106E is present)  . TEST the system for normal operation.

      If DTC B106F is present, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.

  15. B15 CHECK THE SJB HEADLAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN (MKZ WITH HID HEADLAMPS OR MILAN) 
    • For the LH headlamp, measure the resistance between the LH headlamp relay pin 1, circuit CLF04 (BN/BU), BJB face side and the SJB C2280e-13, circuit CLF04 (BN/BU), harness side.
      Fig 18: Measuring Resistance Between LH Headlamp Relay Pin 1, Circuit CLF04 (BN/BU) And SJB C2280e-13, Circuit CLF04 (BN/BU)
      G06257282Courtesy of FORD MOTOR CO.
    • For the RH headlamp, measure the resistance between the RH headlamp relay pin 1, circuit CLF05 (BU/GN), BJB face side and the SJB C2280e-4, circuit CLF05 (BU/GN), harness side.
      Fig 19: Measuring Resistance Between RH Headlamp Relay Pin 1, Circuit CLF05 (BU/GN) And SJB C2280e-4, Circuit CLF05 (BU/GN)
      G06257283Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : GO to  B21.
    2. No  : REPAIR circuit CLF04 (BN/BU) (LH headlamp) or circuit CLF05 (BU/GN) (RH headlamp) for an open. TEST the system for normal operation.
  16. B16 CHECK FOR VOLTAGE TO THE HEADLAMP RELAY (MILAN HYBRID OR MKZ HYBRID) 
    • Place the headlamp switch in the OFF position.
    • Ignition OFF.
    • For the LH headlamp, measure the voltage between the LH headlamp relay pin 3, circuit SBB26 (YE/RD), BJB face side and ground.
    • For the RH headlamp, measure the voltage between the RH headlamp relay pin 3, circuit SBB27 (BU/RD), BJB face side and ground.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to B17.
    2. No  : VERIFY the BJB fuse 26 (15A) (LH headlamp) or fuse 27 (15A) (RH headlamp) is OK. If OK, REPAIR circuit SBB26 (YE/RD) (LH headlamp) or circuit SBB27 (BU/RD) (RH headlamp) for an open. TEST the system for normal operation. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short.
  17. B17 CHECK FOR VOLTAGE TO THE HEADLAMP RELAY USING THE RELAY GROUND (MILAN HYBRID OR MKZ HYBRID) 
    • For the LH headlamp, measure the voltage between the LH headlamp relay pin 3, circuit SBB26 (YE/RD), BJB face side and the LH headlamp relay pin 1, circuit GD123 (BK/GY), BJB face side.
    • For the RH headlamp, measure the voltage between the RH headlamp relay pin 3, circuit SBB27 (BU/RD), BJB face side and the RH headlamp relay pin 1 circuit GD123 (BK/GY)BJB face side.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to B18.
    2. No  : REPAIR circuit GD121 (BK/YE) for an open. TEST the system for normal operation.
  18. B18 BYPASS THE HEADLAMP RELAY (MILAN HYBRID OR MKZ HYBRID) 
    • Connect: Headlamp Assembly.
    • For the LH headlamp, connect a fused jumper wire between the LH headlamp relay pin 3, circuit SBB26 (YE/RD), BJB face side and the LH headlamp relay pin 5, circuit CLF30 (VT/BN), BJB face side.
    • For the RH headlamp, connect a fused jumper wire between the RH headlamp relay pin 3, circuit SBB27 (BU/RD), BJB face side and the RH headlamp relay pin 5, circuit CLF31 (YE/GY), BJB face side.
    • Does the headlamp illuminate? 
    1. Yes  : REMOVE the jumper wire. GO to B19.
    2. No  : REMOVE the jumper wire. REPAIR circuit CLF30 (VT/BN) (LH headlamp) or circuit CLF31 (YE/GY) (RH headlamp) for an open. TEST the system for normal operation.
  19. B19 CHECK THE SJB LOW BEAM OUTPUT CIRCUIT FOR A SHORT TO GROUND (MILAN HYBRID OR MKZ HYBRID) 
    • Disconnect: SJB C2280e.
    • For the LH headlamp, measure the resistance between the LH headlamp relay pin 2 circuit CLF04 (BN/BU), BJB face side and ground.
    • For the RH headlamp, measure the resistance between the RH headlamp relay pin 2 circuit CLF05 (BU/GN), BJB face side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes  : GO to B20.
    2. No  : REPAIR circuit CLF04 (BN/BU) (LH low beam) or circuit CLF05 (BU/GN) (RH low beam) for a short to ground. After the repair:

      If no DTCs are present, TEST the system for normal operation.

      If DTC B106E is present, CLEAR the DTCs and  REPEAT the self-test (required to enable the low beam output driver if DTC B106E is present)  . TEST the system for normal operation.

      If DTC B106F is present, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.

  20. B20 CHECK THE SJB HEADLAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN (MILAN HYBRID OR MKZ HYBRID) 
    • For the LH headlamp, measure the resistance between the LH headlamp relay pin 2 circuit CLF04 (BN/BU), BJB face side and the SJB C2280e-13, circuit CLF04 (BN/BU), harness side.
    • For the RH headlamp, measure the resistance between the RH headlamp relay pin 2 circuit CLF05 (BU/GN), BJB face side and the SJB C2280e-4, circuit CLF05 (BU/GN), harness side.
    • Is the resistance less than 5 ohms? 
    1. Yes  : GO to  B16.
    2. No  : REPAIR circuit CLF04 (BN/BU) (LH headlamp) or circuit CLF05 (BU/GN) (RH headlamp) for an open. TEST the system for normal operation.
  21. B21 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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