1998 Johnson Evinrude "EC" Accessories Service Manual, P/N 520213, Page 96Get this manual
5Connect 12-volt source to the relay "S" terminalsUse an ohmmeter calibrated on high ohms scale or continuity light to test for continuity on relay terminals "B+" and "M" The meter must show continuity
[] 6Leave the 12-volt source connected to the "S" terminalsConnect meter leads to relay terminals "B-" and "M" The meter must show no continuity7If your results vary, replace the relayDR3950