1979 Ski-Doo Supplementary Shop Manual, Page 148Get this manual
SECTION 05
SUB-SECTION 03 (ELECTRICAL TESTS)
6BRAKE LIGHT 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 248294 4Crank engineA Indicator lamp lights: Brake light coil output is up to specificationsRepeat test at least three (3) times to verify reading and consistencyBIndicator lamp does not light: Brake light coil output is defectiveSwitch position LOW Dial