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:

    Manifold Gauge Set Connection
    Special Tool(s) R-134a Manifold Gauge Set 176-R032A or equivalent 1. Turn both valves on the R-134a Manifold Gauge Set clockwise to close the low- and highpressure hoses to the center manifold and center hose. 2. Remove the A/C charging valv ...

    Removal
    1. Disconnect the battery ground cable. For additional information, refer to Section. 2. Raise and support the vehicle. For additional information, refer to Section. 3. Place a drain pan under the transmission fluid pan. 4. Drain transmission fluid. ...

    Accessories
    For a complete listing of the accessories that are available for your vehicle, please contact an authorized dealer or visit our online store at Accessories.Ford.com (United States only). Ford Custom Accessories are available for your vehicle through an author ...