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:

    Disassembly
    1. CAUTION: Do not place the cylinder head flat on the bench; the valves will bend. CAUTION: Before disassembly begins, mark the valve position on the face of each valve being removed. The valves must be re-installed into the same positions. Install the spec ...

    Supercharger Belt
    Removal and Installation 1. Remove the supercharger drive belt cover. 2. Rotate the supercharger belt tensioner clockwise and remove the supercharger belt. 3. To install, reverse the removal procedure. ...

    Runout Check - Brake Disc and Hub
    Special Tool(s) Brake Measurement Kit 134-R0199 or equivalent Material Item Specification High Temperature Nickel Anti- Seize Lubricant F6AZ-9L494-AA ESE-M12A4- A CAUTION: The brake disc (1126) runout specification must ...