FixVault
Home › Ford › 1997 › Windstar Base, 3.0 U › Repair and Diagnosis › Accessories & Equipment › Cruise Control Systems › Testing › Speed Control Inoperative

Speed Control Inoperative

  1. Turn ignition off. Disconnect speed control servo connector. Turn ignition on. Measure voltage between terminals No. 7 (Purple/Orange wire) and No. 10 (Black wire) of speed control servo connector. If battery voltage is present, go to step 4). If battery voltage is not present, go to next step.
  2. Turn ignition on. Measure voltage between terminal No. 7 (Purple/Orange wire) of Turn ignition on. Measure voltage between terminal No. 7 (Purple/Orange wire) of speed control servo connector and ground. If battery voltage is present, go to next step. If battery voltage is not present, repair Purple/Orange wire, fuse or Gray/Yellow wire (fuse supply circuit) as necessary.
  3. Measure resistance between terminal No. 10 (Black wire) of speed control servo connector and ground. If resistance is less than one ohm, go to step 1). If resistance is greater than one ohm, repair Black wire.
  4. Turn ignition on. Measure voltage between terminals No. 9 (Light Blue/Red wire) and No. 10 (Black wire) of speed control servo connector. DO NOT apply brakes. If battery voltage is present, go tostep 7). If battery voltage is not present, go to next step.
  5. Disconnect speed control deactivator switch connector. Measure voltage between terminal No. 10 (Light Green/Red wire) of speed control deactivator switch connector and ground. If battery voltage is present, go to next step. If battery voltage is not present, repair Light Green/Red wire or fuse.
  6. Measure resistance of Light Blue/Red wire between speed control deactivator switch connector and speed control servo connector. If resistance is less than one ohm, replace speed control deactivator switch. If resistance is greater than one ohm, repair Light Blue/Red wire.
  7. Measure voltage between terminals No. 4 (Red/Light Green wire) and No. 10 (Black wire) of speed control servo connector. DO NOT apply brakes. If battery voltage is present, replace stoplight switch. If battery voltage is not present, go to next step.
  8. With brakes applied, measure voltage between terminals No. 4 (Red/Light Green wire) and No. 10 (Black wire) of speed control servo connector. If battery voltage is present, go to step 12). If battery voltage is not present, go to next step.
  9. Disconnect stoplight switch connector. With brakes applied, measure resistance between terminals of stoplight switch connector. If resistance is less than 5 ohms, go to next step. If resistance is greater than 5 ohms, replace stoplight switch.
  10. Measure voltage between Light Green/Red wire of stoplight switch connector and ground. If battery voltage is present, go to next step. If battery voltage is not present, repair Light Green/Red wire or fuse.
  11. Measure resistance of Red/Light Green wire between stoplight switch connector and terminal No. 4 of speed control servo connector. If resistance is less than 5 ohms, go to step 7). If resistance is greater than 5 ohms, repair Red/Light Green wire.
  12. Measure voltage between terminals No. 5 (Light Blue/Black wire) and No. 10 (Black wire) of speed control servo connector. DO NOT press any speed control actuator switches. If battery voltage is present, replace speed control actuator switch. If battery voltage is not present, go to next step.
  13. With speed control actuator ON switch pressed, measure voltage between terminals No. 5 (Light Blue/Black wire) and No. 10 (Black wire) of speed control servo connector. If battery voltage is present, go to step 17). If battery voltage is not present, go to next step.
  14. Disconnect air bag sliding contact connector. Measure voltage between Dark Blue wire of air bag sliding contact connector and terminal No. 10 (Black wire) of speed control servo connector. If battery voltage is present, go to next step. If battery voltage is not present, repair fuse, Yellow/Light Blue wire, horn relay or Dark Blue wire as necessary.
  15. Disconnect speed control actuator switch connector. Measure resistance across each of air bag sliding contact windings between terminals of air bag sliding contact connector and speed control actuator switch connector. If each resistance reading is .25-.50 ohm, go to next step. If each resistance reading is not .25-.50 ohm, replace air bag sliding contact.
  16. Measure resistance of Light Blue/Black wire and Tan/Orange wire between air bag sliding contact connector and speed control servo connector. If each resistance reading is less than 5 ohms, replace speed control actuator switch. If either resistance reading is greater than 5 ohms, repair Light Blue/Black wire or Tan/Orange wire.
  17. Measure resistance between terminals No. 5 (Light Blue/Black wire) and No. 6 (Tan/Orange wire) of speed control servo connector. DO NOT press any speed control actuator switches. If resistance is greater than 3 k/ohms, go to next step. If resistance is less than 3 k/ohms, replace speed control actuator switch.
  18. With speed control actuator SET/ACCEL switch pressed, measure resistance between terminals No. 5 (Light Blue/Black wire) and No. 6 (Tan/Orange wire) of speed control servo connector. If resistance is 646-714 ohms, go to next step. If resistance is not 646-714 ohms, replace speed control actuator switch.
  19. Measure resistance between terminals No. 3 (Dark Green/White wire) and No. 10 (Black wire) of speed control servo connector. If resistance is 200-300 ohms, go to step 21). If resistance is not 200-300 ohms, go to next step.
  20. Disconnect Vehicle Speed Sensor (VSS) connector. Measure resistance between terminals of VSS connector. If resistance is 200-300 ohms, repair Dark Green/White wire, Pink/Orange wire or Black wire. If resistance is not 200-300 ohms, replace VSS.
  21. Remove speed control servo cable from speed control servo. Check for broken or binding cable by pulling on cable ball slug to ensure throttle moves freely. If speed control servo cable is okay, replace speed control servo. If speed control servo cable is not okay, replace speed control servo cable.
About FixVault