1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 122Get this manual
Ohmmeter TestKey Switch INotel All o.hmmeter tests must be performed with engine NOT running1Install the emergency ignition cutoff switch clip and lanyard f61 2
Calibrate ohmmeter on Rx100 scaleConnect meter leads between engine harness blackyellow lead and clean engine ground Key OFF, meter must show continuity Key ON, meter must show no continuity00
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3If Step 2, Key ON reading shows continuity, disconnect harness blackyellow leads from key switch "M" terminal If meter now shows no continuityRefer to Electrical Section00 ),