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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1489 (Exterior Lighting System) >> Diagnosis And Testing >> Headlamps >> Pinpoint Tests >> Pinpoint Test E: The High Beams Are Always On >> Pinpoint Test E: The High Beams Are Always On

Pinpoint Test E: The High Beams Are Always On

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. 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. E1 CHECK FOR MULTIFUNCTION SWITCH INPUT DTCs 
    • Review the DTCs retrieved from the SJB  self-test.
    • Is DTC B1510 or DTC B2A23 present? 
    • Yes:  GO to E2  .
    • No:  GO to  E4.
  2. E2 CHECK THE MULTIFUNCTION SWITCH 
    • Ignition OFF.
    • Disconnect: Multifunction Switch C202.
    • Ignition ON.
    • Do the high beams continue to illuminate? 
    • Yes:  GO to E3  .
    • No:  INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . CLEAR the DTCs. REPEAT the self-test.
  3. E3 CHECK THE HIGH BEAM REQUEST AND THE FLASH-TO-PASS REQUEST INPUT CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: SJB  C2280b.
    • Measure the resistance between the multifunction switch C202-6, circuit CLF02 (GY/BN), harness side and ground; and between the multifunction switch C202-4, circuit CLF27 (GN/BN), harness side and ground.
      Fig 1: Checking High Beam Request And Flash-To-Pass Request Input Circuits For Short To Ground
      G06065225Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    • Yes:  GO to  E5.
    • No:  REPAIR the circuit in question for a short to ground. CLEAR the DTCs. REPEAT the self-test.
  4. E4 CHECK THE SJB HIGH BEAM OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: SJB  C2280e.
    • Ignition ON.
    • Do the high beams continue to illuminate? 
    • Yes:  REPAIR circuit CLF08 (YE/VT) for a short to voltage. TEST the system for normal operation.
    • No:  GO to E5  .
  5. E5 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? 
    • Yes:  INSTALL a new SJB  . REFER to MULTIFUNCTION ELECTRONIC MODULES . 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.
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