Ford Mustang Service Manual: Pinpoint Tests

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 .
    Inspection and Verification
    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. Visual ...

    Instrument Cluster (Description and Operation)
    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 ...

    Other materials:

    Principles of Operation
    Principles of Operation Evaporative Emission (EVAP) Canister Purge Valve The EVAP canister purge valve is controlled by the powertrain control module (PCM). The EVAP canister purge valve controls the flow of fuel vapors from the EVAP canister to the engi ...

    Daytime Running Lamps (DRL) (Diagnosis and Testing)
    Daytime Running Lamps (DRL) (Diagnosis and Testing) Refer to Wiring Diagrams Cell 97 , Daytime Running Lamps for schematic and connector information. Special Tool(s) 73III Automotive Meter or equivalent 105-R0057 Principles of Operation ...

    Bearings - Inspection
    Manual Transmission The TR3650 five-speed manual transmission features the following: The fifth speed gear functions as an overdrive gear. The forward gears are synchronized and helical cut. The reverse gear operates through a constant-mesh, fully ...