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Pinpoint Test S: The Fog Lamps Are On Continuously

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. 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.
  1. S1 CHECK FOR RECORDED SJB DTCs 
    • Check the recorded results from the SJB self-test.
    • Is DTC B2254 present? 
    1. YES  : Go to  S2.
    2. NO  : Go to  S4.
  2. S2 CHECK THE HEADLAMP SWITCH 
    • Key in OFF position.
    • Disconnect: Headlamp Switch C205
    • Carry out the headlamp switch component test. Refer to appropriate COMPONENT TESTING article.
    • Is the headlamp switch OK? 
    1. YES  : Go to  S3.
    2. NO  : INSTALL a new headlamp switch. REFER to Headlamp Switch . CLEAR the DTCs. REPEAT the self-test.
  3. S3 CHECK CIRCUIT CLF29 (BN) FOR A SHORT TO GROUND 
    • Disconnect: SJB C2280b
    • Measure the resistance between the headlamp switch C205-6, circuit CLF29 (BN), harness side and ground.
      • Fig 1: Checking Circuit For Short To Ground
      GF0016138Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  S6.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  4. S4 CHECK CIRCUIT CLF28 (BN/WH) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: SJB C2280a
    • Key in ON position.
    • Do the fog lamps continue to illuminate? 
    1. YES  : Go to  S5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. S5 CHECK CIRCUIT CLF12 (BN/YE) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: SJB C2280e
    • Key in ON position.
    • Do the fog lamps continue to illuminate? 
    1. YES  : REPAIR the circuit. TEST the system for normal operation.
    2. NO  : Go to  S6.
  6. S6 CHECK FOR CORRECT SJB OPERATION 
    • Key in OFF position.
    • 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 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. CLEAR any DTCs. REPEAT the self-test.
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