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Pinpoint Test G : The LF Tweeter Speaker Is Inoperative Or Has Poor Sound Quality

  1. G1 CHECK THE LF DOOR SPEAKER

    • Ignition ON.
    • Operate the audio system in radio tuner AM/FM mode.

    Does the LF door speaker operate correctly? 

    Yes  GO to  G2.
    No  GO to Pinpoint Test F .

  2. G2 CHECK THE AUDIO SIGNAL TO THE LF TWEETER SPEAKER

    • Ignition OFF.
    • Disconnect: LF Tweeter Speaker C513 .
    • Operate the audio system in radio tuner AM/FM mode.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C513-1
      GFD33602Courtesy of FORD MOTOR COMPANY
      		 C513-3

    Is a fluctuating AC voltage present? 

    Yes  INSTALL a new LF tweeter speaker. Refer to Speaker - Tweeter .
    No  GO to  G3.

  3. G3 CHECK THE AUDIO CIRCUITS TO THE LF TWEETER SPEAKER FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: LF Door Speaker C523 .
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C513-1
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground
      C513-3
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit in question.
    No  GO to  G4.

  4. G4 CHECK THE AUDIO CIRCUITS TO THE LF TWEETER SPEAKER FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C513-1
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground
      C513-3
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  G5.
    No  REPAIR the circuit in question.

  5. G5 CHECK THE AUDIO CIRCUITS FOR A SHORT TOGETHER

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C513-1
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C513-3

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  G6.
    No  REPAIR the circuits.

  6. G6 CHECK THE AUDIO CIRCUITS TO THE LF TWEETER SPEAKER FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C523-2
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C513-1
      C523-4
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C513-3

    Are the resistances less than 3 ohms? 

    Yes  INSTALL a new LF door speaker. Refer to Speaker - Door .
    No  REPAIR the circuit in question.
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