'07-08 Models

Release the clips of the switch and push the switch (A) out of the panel, then disconnect the 5P connector (B) from the main switch.

Fig 1: Identifying 5P Connector From Main Switch
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between the terminals in each switch position according to the table below. If there is no continuity, replace illumination bulbs (A) or the switch.

Fig 2: Identifying Main Switch Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.