1978 Ski-Doo Shop Manual, Page 329Get this manual
SECTION 05 SUB-SECTION 06, (ALTERNATOR)
ALTERNATORREGULATOR TEST (Elite model)
Check battery condition (refer to section 05-05)
BATTERY CHARGING RATE TEST
Connect ammeter to fuse holder of the orange cable (between alternator and battery)"
Condition (charged battery, high output): Disconnect field connectors ass(plastic tab housing) on alternator
To alternator Orange cable
Field connector ass