Test N: Set Speed Fluctuates
- Check That Condition Occurs Only While Using Speed Control - Ensure engine is properly tuned. Ensure problem does not occur while driving vehicle without speed control activated. If problem occurs without speed control activated, repair engine as necessary. If problem occurs only with speed control activated, go to next step.
- Check For Binding In Speed Control Cable & Throttle Body Linkage - Check for binding or sticking speed control servo/actuator cable, throttle linkage and/or throttle plate. Ensure throttle cable bracket and speed control servo/actuator bracket are not loose. Repair as necessary and perform self-test diagnostics using NGS tester. If all components are okay, repair Gray/Black and/or Pink/Orange wire. Perform self-test diagnostics using NGS tester.