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:

    Timing Drive Components
    Special Tool(s) Compressor, Valve Spring 303-567 (T97P-6565-AH) Holding Tool, Crankshaft 303-448 (T93P-6303-A) Aligner, Camshaft Position 303-557 (T96T-6256-B) ...

    Supercharger Cooling
    General Specifications a - Use the same type coolant that was drained from the cooling system. Do not mix coolant types. b - The addition of Motorcraft Cooling System Stop Leak Pellets, VC-6, darkens Motorcraft Premium Gold Engine Coolant from yell ...

    Engine - 4.6L (2V)
    General Specifications a - With installation of a new filter. b - Distance front edge of bearing is installed below front face of cylinder block. c - Time necessary for plunger to leak down 1.6 mm of travel with 222 N force and leak down fluid in tap ...