1979 Ski-Doo Supplementary Shop Manual, Page 150Get this manual
SECTIO 05 SUB-SECTION 03 (ELECTRICAL TESTS)
9LI GHTING CO IL 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 354,454 4Crank engineAIndicator lamp lights: Lighting coil output is up to specificationsRepeat test at least three (3) imes to verify reading and consistency8 Indicator lamp does not light: Lighting coil is faulty Switch position Dial