1993 Johnson Evinrude "ET" 40 thru 55 Service Manual, P/N 508283, Page 140Get this manual
STEPSENSOR COIL TEST Ground Test
[!!J 1Disconnect Amphenol connector:
Rope or Amp, the 5-pin connector 12 Amp, the 3-pin connector
2Set peak-reading voltmeter to:
Rope or Amp, "POS" AND "5", or "SEN" and "5" on Stevens CD-77 meter 12 Amp, "POS" and "5", or "SEN" and "5" on Stevens CD-77 Meterf111 3Alternately, connect voltmeter between sensor coil terminals and clean engine groundRefer to following chart for terminal locationCrank engine and observe meter reading at each connection Any reading indicates sensor coil or leads are grounded Locate and repair ground, or replace sensor coilRope or Amp 12 Amp