Ford Mustang (1999-2004) Service Manual: Inspection and Verification

NOTE: A new instrument cluster must be reconfigured.

NOTE: The instrument panel dimmer switch is a part of the headlamp switch.

1. Verify the customer concern.

2. Visually inspect for obvious signs of electrical damage.

Visual Inspection Chart

Electrical

  • Central junction box (CJB) fuses:

  • 5 (15A)

  • 21 (5A)

  • 34 (20A)

  • 37 (5A)

  • 32 (15A)

  • 27 (20A)

  • Circuitry

  • Damaged switch

3. If the fault is not visually evident, determine the symptom and proceed to the Symptom Chart.

Symptom Chart

Condition Possible Sources Action
  • The control illumination is inoperative
  • Central junction box (CJB) fuse 37 (5A).
  • Circuitry.
  • Headlamp switch.
  • Go To Pinpoint Test A .
  • The instrument cluster illumination is inoperative
  • Circuitry.
  • Instrument cluster.
  • Bulb(s).
  • Go To Pinpoint Test B .
  • The climate control illumination is inoperative
  • Circuitry.
  • Bulb(s).
  • Go To Pinpoint Test C .
  • The audio system illumination is inoperative
  • Circuitry.
  • Audio unit.
  • Go To Pinpoint Test D .
  • A single illumination source is inoperative
  • Circuitry.
  • Switch.
  • Go To Pinpoint Test E .
    Instrument Cluster and Panel Illumination (Diagnosis and Testing)
    Refer to Wiring Diagrams Cell 71 , Instrument Illumination for schematic and connector information. Special Tool(s) 73III Automotive Meter 105-R0057 or equivalent ...

    Pinpoint Tests
    PINPOINT TEST A: THE CONTROL ILLUMINATION IS INOPERATIVE Test Step Result / Action to Take A1 CHECK PARKING LAMPS YesPlace the headlamp switch in the OFF position. GO to A2 . No ...

    Other materials:

    Installation
    1. Align the blend door driver to the full heat position. 2. Place the temperature control knob in the full WARM position. 3. Attach the cable drive to the control head. 4. Rotate the knob back and forth from full WARM to full COOL. 5. Check the cable ...

    Identification Tags
    All vehicles are equipped with a Vehicle Certification Label, located on the driver side door lock post. For correct transmission identification, refer to the code in the space marked TR. For model, service ID level or build date information, refer ...

    Installation
    1. NOTE: If the lower intake manifold is not secured within four minutes, the sealant must be removed and the sealing area cleaned with metal surface cleaner. Allow to dry until there is no sign of wetness, or four minutes, whichever is longer. Failure t ...