1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 116Get this manual
10 DR4077
STEPSENSOR COIL TEST
Ground Test
1Disconnect 5-pin Amphenol connector between the timer base and power pack2Set peak-reading voltmeter to "POS" and "5", "SEN" and "5" on Stevens CD-77 meterr,Q'1 3Alternately, connect voltmeter between each timer base terminal and clean engine groundCrank engine and observe meter at each connection Any reading indicates sensor coils or leads are grounded Locate and repair ground, or replace timer base4If no reading is indicated in Step 3, go to Output TestOutput Test
1Set peak-reading voltmeter to "POS" and "5", "SEN" and "5" on Stevens CD-77 meter