1980 Ski-Doo Shop Manual, Page 201Get this manual
SECTION 04 SUB-SECTION 02, (ELECTRICAL TESTS)
TWO CYLINDER BREAKER POINTS ENGINE
4GENERATOR COIL OUTPUT 5LIGHTING COILS OUTPUT
1Disconnect bluered and black Wires from P.T.Oside ignition coil 2Connect tester lead to bluered and black wires previously disconnectedConnect lead to good engine ground
NOTE: On the engine types covered by thiS test an additional lighting coil IS connected In parallel with the main lighting call; In this case the parallel connection must be broken off as each coil is to be tested Individually1Disconnect wiring harness junction block at engine,
2Connect tester leads as Illustrated uSing two (2) harness adaptors
large call: yellow and yellowblack wires small call; green and greenblack wires"3Set tester switch and dial as follows:
Engine type
Switch position
377444 464, 503, 640