1997 Johnson Evinrude "EU" 90 thru 115 90 CV Service Manual, P/N 507267, Page 119Get this manual
10 DR4077
STEPSENSOR COil TEST
Ground Test
1Disconnect 5-pin Amphenol connector between the timer base and power pack
2Set peak-reading voltmeter to "POS" and "5", "SEN" and "5" on Stevens CO-77 meter3Alternately, connect voltmeter between each timer base terminal and clean engine ground Crank 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 CO-77 meter