Power Mirror and Mirror Defogger Switch Test/Replacement

Remove the driver's door switch trim (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).
Disconnect the 13P connector from the power mirror switch.

Fig 1: Disconnecting 13P Connector From Power Mirror Switch
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between the terminals in each switch position according to the table.
Mirror Switch

Fig 2: Continuity Terminal Chart
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Defogger Switch

Fig 3: Continuity Terminal Chart
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the continuity is not as specified, replace the switch.