1993 Johnson Evinrude "ET" 40 thru 55 Service Manual, P/N 508283, Page 340Get this manual
f51 4terminals ohmmeter on appropriate scale and connect the leads to the two relay "S" Switch
To avoid immediate meter damage, never apply an ohmmeter to an electrical circuit where voltage is present The meter must show 70-100 ohmsr,;'] 5Connect 12 volt source to the relay "S" terminalsUse continuity light, or ohmmeter calibrated