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:

    Assembly
    1. Lubricate the differential side gear thrust washers and the differential side gear journals, and assemble the washers to the gears. Use SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2C192-A ...

    Instrument Cluster (Removal and Installation)
    Removal and Installation All vehicles 1. CAUTION: Electronic modules are sensitive to electrical charges. If exposed to these charges, damage may result. Disconnect the battery ground cable. For additional information, refer to Section. 2. Re ...

    Installation
    1. Install the upper intake manifold gasket. 2. Install the intake manifold and bolts in the sequence shown. 3. Install the PCV valve-to-intake manifold tube. 4. Connect the vacuum hoses and the electrical connector to the EGR vacuum regulator soleno ...