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

NOTE: If any concerns are noted with the speedometer, stoplamps, or horn, address those concerns by referring to their associated sections before continuing speed control diagnosis.

1. Verify the customer concern by operating the speed control system.

2. Visually inspect for obvious signs of mechanical and electrical damage.

Visual Inspection Chart

Mechanical Electrical
  • Deactivator switch
  • Speed control actuator cable not attached to throttle
  • Speed control actuator cable not fully seated to the engine bracket
  • Central junction box (CJB) Fuse:
  • 15 (15A)
  • 33 (15A)
  • 35 (15A)
  •  Battery junction box (BJB) fuse:
  • HORN (20A)
  • Wiring harness
  • Loose or corroded connections
  • Speed control actuator switches

3. If the fault is not visually evident, verify the symptom and GO to the Symptom chart.

    Principles of Operation
    The speed control system is designed to maintain vehicle speed above 48 km/h (30 mph). After the ON switch is depressed, depressing the SET/ACCEL switch will activate the speed control servo. To inc ...

    Symptom Chart
    NOTE: New speed control diagnostic software is available in Version 12 or higher for the diagnostic tool. When using this software, it is necessary to use Next Generation Speed Control Adapter 007- ...

    Other materials:

    Fuel Pressure Sensor
    Material Item Specification Super Premium SAE 5W-20 Motor Oil XO-5W20-DSP or equivalent WSS-M2C914- A Removal WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related compo ...

    Purging - CIII Power Steering Pump
    Special Tool(s) Vacuum Pump 416-D002 (D95L-7559-A) or Equivalent CAUTION: If the air is not purged from the power steering system correctly, premature power steering pump failure can result. This condition can occur on pre-delivery vehicles ...

    Parking Brake Control
    Removal 1. CAUTION: If any component in the parking brake system requires repair or if the rear axle housing (4010) is removed, the cable tension must be released. Place the parking brake control (2780) in the released position. 2. Remove the console. 3. ...