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:

    Air Bag Disposal - Passenger, Undeployed, Scrapped Vehicle
    Remote Deployment WARNING: Always wear safety glasses when repairing an air bag supplemental restraint system (SRS) vehicle and when handling an air bag module or safety belt retractor/pretensioner assembly. This will reduce the risk of injury in t ...

    Heated Window Grid Wire Repair
    Material Item Specification Dark Walnut Metallic Acrylic Lacquer Touch-up Paint ALBZ-19500-5858A or equivalent ESR-M2-P100- C Rear Window Defroster Repair D8AZ-19562-AA or equivalent WSB-M4J58-B 1. NOTE: A single break or an ...

    Selector Lever
    Removal 1. Remove the shifter top control panel. 2. Disconnect the electrical connectors. 3. Remove the shifter bezel. 4. Remove the bulb from the bezel. 5. Disconnect the TCS connector. 6. CAUTION: Extra force may be needed to lift up on the handl ...