1976 Evinrude 200 HP Outboards Service Manual, PN 5199, Page 141Get this manual
KEY SWITCH CHECK (With continuity light or ohmmeter)
1Disconnect battery leads+BAT
2With key switch in "OFF" position, connect continuity light or meter leads between key switch "BATT" and "A" terminalsLight or meter should not show continuity (open circuit)OFF
3Turn key switch to "ON" positionmeter should show continuity
Light or
4Turn key switch to "START" positionor meter should still show continuity