1997 "EU" Johnson Evinrude 5 thru 15 Four Stroke Service Manual, P/N 507262, Page 115Get this manual
DRC6780
Ohmmeter TestKey Switch
INote All ohmmeter tests must be performed with the engine NOT running1Install emergency stop switch clip and lanyard assembly
2Calibrate ohmmeter on appropriate scaleConnect meter leads between key switch end of the single wire (blackyellow) connector and clean engine ground Key OFF, meter must show low reading Key ON, meter must show high reading3If Step 2, key ON reading is low one, disconnect harness blackyellow lead from key switch "M" terminal If meter now shows high reading, replace key switch If meter shows low reading, go to Step 44Disconnect the key switch 6-pin connector If meter now shows high reading, repair or replace key switch harness If meter shows low reading, go to Step 55Disconnect the engine harness to instrument harness 6-pin connector blackyellow lead