1978 Ski-Doo Shop Manual, Page 279Get this manual
SECTION 05 SUB-SECTION 03, (ELECTRICAL TESTS) (
9LIGHTING COIL OUTPUT
NOTE: In some engine types covered by this test an additional lighting coil is connected in parallel with the main lighting coil, in this case, the test will determine if the whole assembly is working right or notIf test appears to be negative, each component must be checked separately
1Disconnect wiring harness junction block at engine2Connect tester leads as illustrated using two (2) harness adaptors