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:

    1-2 Accumulator
    Removal 1. Compress the 1-2 accumulator cover and remove the accumulator piston retaining ring. 2. NOTE: Note the location of the 1-2 accumulator springs for reference during assembly. Remove the 1-2 accumulator. 1. Remove the 1-2 accumulator cover. 2. ...

    Exhaust Manifold to Exhaust Gas Recirculation (EGR) Valve Tube - Cobra
    Removal and Installation 1. Remove the EGR valve. For addditional information, refer to Exhaust Gas Recirculation (EGR) Valve-Cobra in this section. 2. With the vehicle in NEUTRAL, position it on a hoist. 3. Disconnect the exhaust manifold to EGR valve ...

    Anti-theft system
    The active anti-theft system is designed to warn you in the event of unauthorized vehicle entry and is also designed to help prevent unwanted towing of the vehicle. You can choose what is monitored by arming the system in different ways. Partial Monitor Mode ...