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:

    Degas Bottle - 4.6L(2V) and 4.6L(4V)
    Removal and Installation 1. Drain the engine coolant from the degas bottle only. For additional information, refer to Cooling System Draining, Filling and Bleeding in this section. 2. Disconnect the radiator vent hose. 3. Remove the degas bottle return hos ...

    Paint Codes
    The first set of paint code letters/numbers listed indicate the vehicle primary body color. The second set of paint code letters/numbers listed (if applicable) indicate a two-tone or accent body color. B7 - Zinc Yellow (clear coat) CX - Dark Shadow Gray ...

    Tire Pressure Monitoring System (TPMS)
    WARNING: The tire pressure monitoring system is NOT a substitute for manually checking tire pressure. The tire pressure should be checked periodically (at least monthly) using a tire gauge. See Inflating Your Tires in this chapter. Failure to properly maintai ...