1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 136Get this manual
191 _ Ground Test
STEPSENSOR COIL TEST
1Disconnect the two 4-pin Amphenol connectors between the timer base and power pack2Set peak-reading voltmeter to "POS" and "5," "SEN" and "5" on Stevens CO-77 meter
3Alternately connect PRV meter 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 base
4If 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
I.JOl 2Attach PRV meter black lead to port timer base connector, terminal "D Alternately attach meter
red lead to starboard timer base connector, terminals "A," "B," and "C" and port timer base connector, terminals "A," "B," and "C 3Crank engine and observe meter at each connection If meter shows 0.2 volt or higher, go to Step If meter shows less than 0.2 volt, check condition of wiring and connectors If wiring and connector condition is good, go to Ohmmeter Test