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:

    Reverse Clutch
    Special Tool(s) Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) Compressor, Clutch Spring 307-015 (T65L-77515-A) Protector, Transmission Reverse Clutch Outer Fluid Seal 307-424 Protecto ...

    Evaporator Core Orifice
    NOTE: The evaporator core orifice is an integral part of the condenser to evaporator line and should be installed as an assembly with the line. NOTE: A new evaporator core orifice should be installed whenever a new A/C compressor is installed. The evapora ...

    Installation
    1. Align the blend door driver to the full heat position. 2. Place the temperature control knob in the full WARM position. 3. Attach the cable drive to the control head. 4. Rotate the knob back and forth from full WARM to full COOL. 5. Check the cable ...