Test B: Flash Code 1 - Speed Control Is Inoperative
- Check Speedometer Operation
- Test drive vehicle and observe speedometer operation. If speedometer operates properly, go to next step. If speedometer does not operate properly, see appropriate INSTRUMENT PANEL article to continue diagnosis.
- Check Vehicle Speed Sensor (VSS) Circuitry
Turn ignition off. Disconnect speed control servo/actuator connector C103 (located behind left headlight). Using an ohmmeter, check resistance between ground and speed control servo/actuator connector C103 terminal No. 3. See Fig 1
. If resistance is more than 10 k/ohms, go to next step. If resistance is 10 k/ohms or less, repair Dark Green/White or Gray/Black wire between speed control servo/actuator and VSS. Perform SELF-DIAGNOSTIC TEST.
- Check Dark Green/White & Gray/Black Wires For Open
Ensure ignition is off. Disconnect VSS connector C111 (located on left rear side of transmission). Using an ohmmeter, check resistance between speed control servo/actuator connector C103 terminal No. 3 and VSS connector C111 Gray/Black wire terminal. If resistance is less than 5 ohms, replace speed control servo/actuator and perform SELF-DIAGNOSTIC TEST. If resistance is 5 ohms or more, repair open in Dark Green/White wire or Gray/Black wire between speed control servo/actuator and VSS. Perform SELF-DIAGNOSTIC TEST.
Courtesy of FORD MOTOR CO.