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:

    Oil Pan
    Special Tool(s) Compressor, Coil Spring 204-D001 (D78P-5310-A) Lifting Bracket, Engine 303-D088 (D93P-6001-A2) 3-Bar Engine Support Kit 303-F072 Material Item Specification Metal Surface Cleaner F4 ...

    Pinpoint Tests
    PINPOINT TEST A: THE CONTROL ILLUMINATION IS INOPERATIVE Test Step Result / Action to Take A1 CHECK PARKING LAMPS YesPlace the headlamp switch in the OFF position. GO to A2 . No REFER to Section. Place the headlamp switch ...

    Input Shaft and Bearing
    Special Tool(s) Plate, Bearing/Oil Seal 205-090 (T75L-1165-B) Puller, Bearing 205-D064 (D84L-1123-A) Installer, Drive Pinion Bearing Cone 205-004 (T53T-4621-B) Adapter Set, Step Plate 205-DS011 (D80L-630 ...