1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 296Get this manual
Power Supply Troubleshooting
Before beginning this procedure: Charge battery and connect battery cables Turn key switch OFF, and remove key Remove the clip from the emergency stop switch All tests are made from the RELAY SIDE of the trimtilt relay sockets1Connect voltmeter black lead to clean engine ground2Check for voltage at battery side of starter solenoid If no voltage, check battery and wiring If voltage, go to Step (or Step 12, if problem is only with tilt downtrim in)
UP CIRCUIT
3Remove relays from relay sockets
[!] 4Connect voltmeter red lead to V1 and black lead to V2 If no voltage at V1, check red wire between starter solenoid terminal and relay socketsIf red wire is OK, check black wire between relay sockets and engine ground If voltage at V1, go to Step 5