2004-09 Models

Remove the two screws securing the cruise control set/decel, resume/accel, cancel switch, then remove the switch.

Fig 1: Removing Cruise Control Set/Decel, Resume/Accel, Cancel Switch (2004-06 Models)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Disconnect the connector from the switch.
Check for continuity between the terminals in switch position according to the table. There should be continuity while pressing the switch down, and no continuity when the switch is released.

Fig 2: Cruise Control Set/Decel, Resume/Accel, Cancel Switch Terminals Continuity Checking Reference Chart
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If either switch is faulty, replace the switch assembly.
If the switch is OK, but switch failure has occurred on the cruise control unit input test (2004-05 models) or cruise control input test (2006-08 model), check and repair the wire harness on the switch circuit.