LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2004 >> Mustang Mach 1, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Speed Control System >> Diagnosis And Testing >> Speed Control >> Pinpoint Tests >> Pinpoint Test F: The Speed Control Switch Is Inoperative-Set/ACCEL
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Pinpoint Test F: The Speed Control Switch Is Inoperative-Set/ACCEL

  1. F1 CHECK THE SPEED CONTROL ACTUATOR SWITCH 
    • Key in OFF position.
    • Disconnect: Speed Control Servo C122.
    • Measure the resistance between speed control servo C122 Pin 5, Circuit 151 (LB/BK), harness side and speed control servo C122 Pin 6, Circuit 848 (DG/OG), harness side, while pressing the speed control actuator switch SET/ACCEL.
      Fig 1: Checking Speed Control Actuator Switch
      G03242145Courtesy of FORD MOTOR CO.
    • Is the resistance between 612 and 748 ohms? 
    1. Yes:  INSTALL a new speed control servo. REFER to ACTUATOR - SPEED CONTROL SERVO . TEST the system for normal operation. Speed Control Actuator. TEST the system for normal operation.
    2. No:  INSTALL a new speed control actuator switch. REFER to SWITCH - SPEED CONTROL ACTUATOR . Test the system for normal operation.