1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 291Get this manual
AC Lighting Coil Resistance Check f1l 1Calibrate ohmmeter on appropriate scaleConnect between yellowgray and yellow leads Meter must show 0.86 0.05 ohmf21 2Connect meter between yellowgray leads
and yellowblue
Meter must show 1.21 0.02 ohmsf31 3Calibrate ohmmeter on appropriate scaleConnect one lead to clean engine ground Probe each of the connector pins with the other ohmmeter jumper wire The ohmmeter should show high reading If the ohmmeter reading is low, repair the grounded coil lead or replace the coil assembly