1980 Ski-Doo Shop Manual, Page 207Get this manual
SECTION 04 SUB-SECTION 03, (ELECTRIC STARTER)
Test for ground circUit In the armature using growler test probesCheck between armature core and the commutator barsIf growler lamp turns on, bars are grounded
Field windings and brushes
Test the field winding for open circuit uSIOg growler test probesPlace one test probe on the negative brush and the other test probe on the yokeIf growler lamp does not turn on, the field w'lnding has an open-circuitThe yoke has to be repaired or replaced
Commutator