1983 Ski-Doo Shop Manual, Page 233Get this manual

1983 Ski-Doo Shop Manual, Page 233

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SECTION 04 ELECTRICAL SUB-SECTION 06 (TESTING PROCEDURE)
THE CONTROL UNIT DIODE IS OPEN-CIRCUITED

CONTROL UNIT DIODE IS GOOD

THE CONTROL UNIT DIODE IS SHORT-CIRCUITED