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:

    Removal
    1. Remove the air intake scoop bracket. For additonal information, refer to Section. 2. Remove the air cleaner outlet tube. For additional information, refer to Section. 3. Disconnect the accelerator cable, the speed control actuator cable and the return ...

    Wheel Leaks
    Material Item Specification Professional Choke and Linkage Cleaner F8AZ-19520-AB WSS-M14P10- B Aluminum Wheel Repair Compound ESA-M4G280- A WARNING: Wheel repairs that use welding or peening are not approved. An inner tube ...

    Horn (Diagnosis and Testing)
    Refer to Wiring Diagrams Cell 44 , Horns/Cigar Lighter for schematic and connector information. Special Tool(s) 73 Digital Multimeter or equivalent 105-R0051 Inspection and Verification 1. Verify the customer concern by operating the h ...