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:

    Installation
    Using special tool 205-024 NOTE: This is the preferred method for installing the pinion bearing cups. If necessary, proceed to Using special tools 205-153, 205-024, 205-231, and 205-D055 in this procedure for an alternate method. 1. Position the special too ...

    Battery and Cables
    Vehicles are equipped with a 12 volt maintenance-free battery that contains a built-in hydrometer. The hydrometer eye indication is as follows: A green dot means the battery is OK. A yellow dot, red dot, or when the green dot is not visible, ...

    Fuel Tank Draining
    Special Tool(s) Fuel Storage Tanker 164-R3202 or equivalent Fuel Tank Drain Hose 310-F013 WARNING: Do not smoke or carry lighted tobacco or an open flame of any type when working on or near any fuel-related components. Highly fla ...