1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Manual, Page 270Get this manual
AC Lighting Coil Resistance Check
INote This test is made with an ohmmeter and jumper wires to
insert into the AC lighting connector
1Calibrate an ohmmeter on the low ohms scale and connect one ohmmeter jumper lead to the connector yellowgrey lead Connect the other ohmmeter jumper lead to the connector yellow lead Ohmmeter should read 0.86