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Pinpoint Test I: The Video System Is Inoperative

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
  1. I1 CHECK THE VOLTAGE AT DVD PLAYER 
    • Disconnect: DVD Player C949.
    • Key in ON position.
    • Measure the voltage between the DVD player C949-;, circuit 1001 (WH/YE), harness side and ground.
      Fig 1: Measuring Voltage Between DVD Player C949- And Ground
      G03945571Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to I2.
    • No  : REPAIR the circuit. TEST the system for normal operation.
  2. I2 CHECK THE GROUND CIRCUITS TO THE DVD PLAYER 
    • Key in OFF position.
    • Measure the resistance between the DVD player C949-3, circuit 1205 (BK), harness side and ground; and between the DVD player C949-16, circuit 1203 (BK/LB), harness side and ground.
      Fig 2: Checking Ground Circuits To DVD Player
      G03945572Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes  : GO to I3.
    • No  : REPAIR the circuit(s) in question. TEST the system for normal operation.
  3. I3 CHECK THE WAKE-UP SIGNAL TO THE DVD PLAYER 
    • Key in ON position.
    • Turn on the audio unit.
    • Measure the voltage between the DVD player C949-20, circuit 1068 (LG/BK), harness side and ground.
      Fig 3: Measuring Voltage Between DVD Player C949-20 And Ground
      G03945573Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : GO to I4.
    • No  : REPAIR the circuit. TEST the system for normal operation.
  4. I4 CHECK THE COMMUNICATION CIRCUITS BETWEEN THE DVD PLAYER AND THE AUDIO UNIT 
    • Key in OFF position.
    • Measure the resistance between the DVD player, harness side and the audio unit, harness side; and between the DVD player, harness side and ground as follows:
      DVD PLAYER & AUDIO UNIT CONNECTOR REFERENCE

      DVD Player Connector-Pin DM100 Connector-Pin CD6 Connector-Pin Circuit
      C949-18 C240a-6 C290b-7 832 (LB/PK)
      C949-19 C240a-7 C290b-6 833 (TN)
    • Are the resistances less than 5 ohms between the DVD player and the audio unit, and greater than 10,000 ohms between the DVD player and ground? 
    • Yes  : INSTALL a new DVD player. REFER to DIGITAL VERSATILE DISC (DVD) PLAYER . TEST the system for normal operation.
    • No  : REPAIR the circuit(s) in question. TEST the system for normal operation.
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