1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, Page 129Get this manual
6 DR6224
Ohmmeter TestKey Switch INotel All ohmmeter tests must be performed with the engine NOT running
1Install the emergency stop switch clip2Disconnect the 5-pin Amphenol connector between the power pack and ignition plate[] 3Calibrate ohmmeter on appropriate scaleConnect meter leads between ignition plate end of connector, terminal "E", and clean engine ground Key OFF, meter must show low reading Key ON, meter must show high reading4If Step 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 55Disconnect 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 66Disconnect the engine harness to instrument harness 6-pin connector that contains the blackyellow lead If meter now shows high reading, repair or replace instrument harness If meter shows low reading, repair or replace engine harness7Ifthe engine fails to shut off, test for open blackyellow lead, blackwhite lead, damaged key switch, or damaged power pack8Complete all circuits disconnected during this test