1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Repair Manual P/N 507947, Page 279Get this manual
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Power Supply Tests 1 Disconnect battery cabIes from battery
[!] 4 Disconnect the warning horn 3-pin Ampheno connectorr;l 5 Calibrate ohmmeter appropriate scaleConnect meterbIack lead to t