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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2534 (Exterior Lighting System) >> Diagnostic Tests >> Parking, Rear and License Plate Lamps >> Pinpoint Tests >> Pinpoint Test Q: The Parking, Rear And License Plate Lamps Are On Continuously >> Pinpoint Test Q: The Parking, Rear And License Plate Lamps Are On Continuously

Pinpoint Test Q: The Parking, Rear And License Plate Lamps Are On Continuously

WARNING: This page is about a different car, the 2010 Lincoln Town Car. 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. Q1 CHECK THE RECORDED DTCs FROM THE LCM SELF-TEST 
    • Use the recorded results from the LCM self-test.
    • Is DTC B1578 present? 
    1. YES  : Go to  Q2.
    2. NO  : Go to  Q4.
  2. Q2 VERIFY DTC B1578 
    • Key in OFF position.
    • Disconnect: LCM C2145a
      NOTE: Make sure the headlamp switch is in the OFF position.
      • Fig 1: Checking Circuit
      GF0014562Courtesy of FORD MOTOR CO.
    • Measure the resistance between the LCM C2145a-9, circuit 1032 (WH/BK), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  Q5.
    2. NO  : Go to  Q3.
  3. Q3 CHECK CIRCUIT 1032 (WH/BK) FOR A SHORT TO GROUND 
    • Disconnect: Headlamp Switch C205a
      • Fig 2: Checking Circuit
      GF0014562Courtesy of FORD MOTOR CO.
    • Measure the resistance between the LCM C2145a-9, circuit 1032 (WH/BK), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : INSTALL a new headlamp switch. REFER to Headlamp Switch . CLEAR the DTCs. REPEAT the self-test.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  4. Q4 CHECK CIRCUIT 14 (BN) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: LCM C2145d
    • Key in ON position.
    • Do the exterior lamps continue to illuminate? 
    1. YES  : REPAIR the circuit. TEST the system for normal operation.
    2. NO  : Go to  Q5.
  5. Q5 CHECK FOR CORRECT LCM OPERATION 
    • Key in OFF position.
    • Disconnect all the LCM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the LCM 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 LCM. 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 the DTCs. REPEAT the self-test.
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