LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1520 (Exterior Lighting System) >> Diagnostic Tests >> AUTOLAMPS >> Pinpoint Tests >> Pinpoint Test F: The Autolamps Are Inoperative >> Pinpoint Test F: The AUTOLAMPS Are Inoperative

Pinpoint Test F: The AUTOLAMPS Are Inoperative

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
  1. F1 CHECK THE MANUAL HEADLAMP AND PARKING LAMP OPERATION 
    • Place the headlamp switch in the HEADLAMPS ON position.
    • Do the headlamps and parking lamps operate correctly? 
    1. YES  : Go to  F2.
    2. NO  : REFER to Headlamps  or Parking, Rear and License Plate Lamps .
  2. F2 CHECK FOR VOLTAGE TO THE LIGHT SENSOR 
    • Disconnect: Light Sensor C287
    • Key in ON position.
    • Place the headlamp switch in the AUTOLAMPS ON position.
      • Fig 1: Checking Circuit For Voltage
      GF0014544Courtesy of FORD MOTOR CO.
    • Measure the voltage between the light sensor C287-2, circuit 218 (WH/VT), harness side and ground.
    • Is the voltage approximately 5 volts? 
    1. YES  : INSTALL a new light sensor. REFER to Light Sensor . TEST the system for normal operation.
    2. NO  : Go to  F3.
  3. F3 CHECK CIRCUIT 218 (WH/VT) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: LCM C2145a
      • Fig 2: Checking Circuit For Short To Ground
      GF0014545Courtesy of FORD MOTOR CO.
    • Measure the resistance between the light sensor C287-2, circuit 218 (WH/VT), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  F4.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. F4 CHECK FOR CORRECT LCM OPERATION 
    • 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.
scientia non olet · About LEMON Manuals