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Pinpoint Test E: A Single Illumination Source Is Inoperative

  1. E1 CHECK VOLTAGE CIRCUITS TO THE INOPERATIVE ILLUMINATION SOURCE 
    • Disconnect: Inoperative Illumination Source.
    • Turn the headlamp switch to the parking lamps ON position.
    • Rotate the instrument panel dimmer switch to the full illumination position.
    • Measure the voltage between the inoperative illumination source, harness side and ground. Refer to the following table for the correct vehicle, illumination source, connector, pin and circuit information.
      CONNECTOR-PIN SPECIFICATIONS

      Vehicle Illumination Source Connector-Pin Circuit
      Expedition/ Navigator A4WD mode select switch C284-4 19 (LB/RD)
      Expedition Ash receptacle C2014-1 19 (LB/RD)
      Navigator Ash receptacle C2246-2 505 (GY/YE)
      Expedition/ Navigator Message center C253-1 19 (LB/RD)
      Expedition Adjustable pedal switch C2089-5 19 (LB/RD)
      Navigator Memory adjustable pedal switch C2235-2 19 (LB/RD)
      Expedition/ Navigator DVD player C9020-3 19 (LB/RD)
      Expedition/ Navigator Traction control switch C280-8 19 (LB/RD)
      Navigator Brake shift interlock C2096-4 235 (RD/BK)
      Navigator Clock C2016-2 19 (LB/RD)
      Navigator Window control switch C3193b-5 19 (LB/RD)
      Navigator LH rear door window switch C717-5 19 (LB/RD)
      Navigator RH rear door window switch C819-5 19 (LB/RD)
      Navigator Flip window switch C999-2 19 (LB/RD)
      Navigator Moon roof switch C9001-2 19 (LB/RD)
      Navigator Power liftgate switch C9000-2 19 (LB/RD)
      Navigator LH door lock switch C541-2 19 (LB/RD)
      Navigator RH door lock switch C632-2 19 (LB/RD)
      Navigator Memory set switch C503-3 19 (LB/RD)
      Navigator Headlamp switch C205b-5 19 (LB/RD)
      Navigator Headlamp switch C205C-1 19 (LB/RD)
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to E2.
    • No  : REPAIR the circuit in question. TEST the system for normal operation.
  2. E2 CHECK THE INOPERATIVE ILLUMINATION SOURCE GROUND 
    • Measure the resistance between the inoperative illumination source, harness side and ground. Refer to the following table for the correct vehicle, illumination source, connector, pin and circuit information
      CONNECTOR-PIN SPECIFICATIONS

      Vehicle Illumination Source Connector-Pin Circuit
      Expedition/ Navigator A4WD mode select switch C284-1 57 (BK)
      Expedition Ash receptacle C2014-2 57 (BK)
      Navigator Ash receptacle C2246-2 57 (BK)
      Expedition/ Navigator Message center C253-4 57 (BK)
      Expedition Adjustable pedal switch C2089-4 57 (BK)
      Navigator Memory adjustable pedal switch C2235-1 57 (BK)
      Expedition/ Navigator DVD player C9020-14 694 (BK/LG)
      Expedition/ Navigator Traction control switch C280-7 57 (BK)
      Navigator Brake shift interlock C2096-6 57 (BK)
      Navigator Clock C2016-5 57 (BK)
      Navigator Window control switch C3193b-6 57 (BK)
      Navigator LH rear door window switch C717-1 57 (BK)
      Navigator RH rear door window switch C819-1 57 (BK)
      Navigator Flip window switch C999-1 57 (BK)
      Navigator Moon roof switch C9001-1 57 (BK)
      Navigator Power liftgate switch C9000-1 57 (BK)
      Navigator LH door lock switch C541-4 57 (BK)
      Navigator RH d4oor lock switch C632-1 57 (BK)
      Navigator Memory set switch C503-4 57 (BK)
      Navigator Headlamp switch C205b-4 57 (BK)
      Navigator Headlamp switch C205C-2 57 (BK)
    • Is the resistance less than 5 ohms? 
    • Yes  : INSTALL a new component in question. TEST the system for normal operation.
    • No  : REPAIR the circuit in question. TEST the system for normal operation.
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