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:

    Valve Cover - LH
    Removal and Installation 1. Position the ignition wires (12281) aside. 2. Disconnect the positive crankcase ventilation (PCV) valve (6758). 3. Remove the ignition coil and position aside. 1. Disconnect the electrical connector. 2. Disconnect the ac ...

    Assembly
    1. Install the valve stem seals. 2. Install the valves and the valve springs. 3. CAUTION: Make sure the tool is seated correctly on the valve spring. Apply a small amount of air at a time. This will prevent the tool from shifting and causing damage to the ...

    Fuel Charging And Controls
    The fuel injection supply manifold (9F792): delivers fuel to the fuel injector. receives fuel from the fuel supply line. The throttle body (9E926): controls air supply to the upper intake manifold (9424) by positioning the throttle plate. connects the ...