1978 Ski-Doo Shop Manual, Page 286Get this manual
SECTION 05 SUB-SECTION 03, (MERC-O-TRONIC TEST)
TEST NO.2 IGNITION COIL INSULATION
1Connect the black test lead to terminal no15 of the ignition coil2Connect the red test lead to terminal no1 of ignition coil3Plug the Insulation Test Probe into "jack" located at the front of analyser4Turn selector switch to position no1 COIL POWER TEST5Turn current control knob to obtain maximum current reading_ CAUTION: readingDo not exceed maximum meter