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:

    Front Seat Backrest
    Removal and Installation All vehicles 1. Remove the seat. For additional information, refer to Seat-Front Power in this section. 2. Remove the front seat backrest latch. For additional information, refer to Latch-Front Seat Backrest in this section. ...

    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 ...

    Assembly
    1. NOTE: One tab that locks the reverse clutch drum into the reverse sun shell may be removed. This is done for balancing purposes. Inspect the clutch cylinder thrust surfaces, piston bore and clutch plate serrations for scores or burrs. Minor scores or bu ...