1992 Johnson Evinrude "EN" 9.9 thru 30 Service Manual, P/N 508142, Page 310Get this manual
Running Test, Alternator Output Disconnect battery cables before proceeding with this check1Remove the rectifier red lead from the terminal board2Wire 0-40 amp ammeter in series with the rectifier red lead and the wiring harness red lead
1000 2000 3000 4000 5000 6000
ill coming in contact with engine ground while the engine is
runningContact may cause arcing
"" Guard against any red wire, its terminals, or the ammeter