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:

    Transmission fluid check
    Checking Automatic Transmission Fluid Note: Transmission fluid should be checked and, if required, added by an authorized dealer. The automatic transmission does not have a transmission fluid dipstick. See your Scheduled Maintenance Information for scheduled ...

    Disassembly
    1. NOTE: Mark the position of each gear shifter fork (7230). Place the gear shift plates (7N232) and the gear selector interlock sleeve (7K201) in the neutral position to center the gear shift plates and the selector body (7302). 2. Rotate the main shif ...

    Keyless Entry (Diagnosis and Testing)
    Refer to Wiring Diagrams Cell 59 , Generic Electronic Module for schematic and connector information. Refer to Wiring Diagrams Cell 111 , Remote Keyless Entry (RKE) for schematic and connector information. Special Tool(s) 73 Digital M ...