1990 Johnson Evinrude "ES" Electric Trollers Service Manual, P/N 507869, Page 45Get this manual
Power Supply Continuity Test24 Foot Control Models NoteTo avoid damaging components or troubleshooting
equipment, disconnect the proceeding
battery cables before
1Use continuity light or ohmmeter calibrated on high ohms scale to test continuity2Connect one meter lead to electric outboard RED battery cableLeave this meter lead connected for all the following tests 3Move 12 24 switch to 24 V
4V sWitch
second meter lead to RED 12 gao lead at 12 24