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:

    Extension Housing Seal and Gasket
    Special Tool(s) Slide Hammer 100-001 (T50T-100-A) Installer, Transmission Extension Housing Fluid Seal 308-002 (T61L-7657-A) Remover, Transmission Fluid Seal 307-048 (T74P-77248-A) Removal 1. Drain the transmiss ...

    Installation
    1. Inspect the rear axle pinion flange seal journal for rust, nicks, and scratches prior to installing the flange. Polish the seal journal with fine crocus cloth, if necessary. 2. Lubricate the rear axle pinion flange splines. Use SAE 75W-140 High Performa ...

    Front Subframe - 4.6L (4V) Engine
    Special Tool(s) 3-Bar Engine Support Kit 303-F072 Lifting Bracket, Engine 303-D088 (D93P-6001-A2) Removal and Installation All vehicles 1. Remove the steering gear. For additional information, refer to Section . 2. Remove the low ...