Set speed does not cancel when the cancel switch is pressed
Diagnostic procedure
  1. Check for diesel engine management system DTCs.
  2. Do the cruise control input test. Test the cruise control cancel switch signal input.
  3. Do the cruise control combination switch test.
Also check for
  • Open circuit, loose or disconnected terminals: YEL/RED, GRY or LT GRN/BLK, YEL