Main Switch

Remove switch from instrument panel. Check for continuity between between terminals "C" and "E" with main switch in "OFF" position. Check for continuity between between terminals "B" and "C", terminals "C" and "E", and terminals "B" and "E", with main switch in "ON" position. There should be continuity. Check resistance between terminals "C" and "E". There should be 20 ohms resistance. See Fig 1.

Fig 1: Main Switch Terminal Identification

Courtesy of AMERICAN HONDA MOTOR CO., INC.