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:

    Trim Panel - Quarter, Convertible
    Special Tool(s) Safety Belt Bolt Bit 501-010 (T77L-2100-A) Removal and Installation 1. Lower the convertible top to the full down position. 2. Remove the rear seat cushion. 3. Remove the two bolts and the rear seat backrest. 4. Remove ...

    Status bars
    The top status bar shows the current mode, exterior temperature, time and display icons if you have enabled Bluetooth or other options. The bottom status bar shows the Home icon and may show the current driver and passenger selected temperatures, fan speed a ...

    Hydraulic Brake Actuation (Description and Operation)
      CAUTION: Blistering or swelling of rubber brake components may indicate contamination of the brake fluid by a petroleum based substance. New rubber components must be installed in the hydraulic brake system if contaminated and the entire hydraulic ...