Speed Control Will Not Turn Off With Off Switch

Turn ignition off. Unplug 10-pin connector from servo. While pressing OFF switch, measure resistance between servo harness connector pins No. 5 (Light Blue/Black wire) and No. 6 (Dark Green/Orange wire). Rotate steering wheel through full range while making measurement. If resistance is greater than 4 ohms, replace OFF switch. If resistance is less than 4 ohms, replace servo.