1978 Ski-Doo Shop Manual, Page 274Get this manual
SECTION 05 SUB-SECTION 03, (ELECTRICAL TESTS)
ONE CYLINDER ENGINE
1GENERATOR COIL OUTPUT
1Disconnect blue and black wires from terminal (15) of Ignition coil2Attach tester lead to blue and black wires previously disconnectedConnect tester lead to good engine ground
2LIGHTING COIL OUTPUT
1Disconnect wiring harness junction block at engine2Connect tester leads as illustrated using two (2) harness adaptors
3Set tester dial and switch as follows: Engine type Switch position
3Set tester dial and switch as follows: Dial Engine type Switch position LOW Dial