1988 Johnson Evinrude "CC" 9.9 thru 30 Service Manual, P/N 507660, Page 150Get this manual
Step 1 Charge Coil Running Tests Using C.DVoltmeter and Adapter
Charge Coil Output TestSeparate the five-wire connector and plug both ends into the adapter Set the voltmeter switches to "-" and "500 Turn all the adapter switches to ON
INote Rou.te all tester leads so they do not interfere with
engine parts
black lead in jack "D Start the engine and run at RPM where problem exists Observe the meterStop the engine If the meter indicates continuous reading of 250 volts or higher, the charge coil is OKProceed to Step 2Sensor Coil Running Tests Using CD Voltmeter and Adapter No or low meter reading, refer to Charge Coil Ground TestCharge Coil Ground TestTurn all adapter switches OFF Set the voltmeter switches to-" and "500
A Place the meter red lead in jack "A" and the meter
:.CO:3:.04:2:1