'02-05 Models

Remove the instrument panel (see INSTRUMENT PANEL REMOVAL/INSTALLATION ).
Remove the rear window defogger switch (A), then disconnect the 6P connector (B).

Fig 1: Identifying Rear Window Defogger Switch & 6P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between the terminals in each switch position according to the table below.

Fig 2: Identifying Terminal Position Continuity Table
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the continuity is not as specified, replace the bulbs (C) or the switch.