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:

    Flexplate
    Removal and Installation 1. Remove the transmission. For additional information, refer to Section. 2. Remove the six bolts retaining the flexplate to crankshaft, and remove the flexplate. 3. To install, reverse the removal procedure. Tighten the bolts in ...

    Air Conditioning (A/C) Compressor Bracket - 3.8L
    Removal and Installation 1. Remove the A/C compressor (19703). For additional information, refer to Air Conditioning (A/C) Compressor-3.8L in this section. 2. Remove the three bolts and one nut. 3. Remove the A/C compressor mounting bracket. 4. To install ...

    Reporting safety defects (U.S. only)
    If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) in addition to notifying Ford Motor Company. If NHTSA receives si ...