2004 Ski-Doo REV Series Factory Service Manual, Page 282Get this manual
Section 07 ELECTRICAL SYSTEM Subsection 04 (ELECTRIC STARTER)
Test for Ground Circuit in the Armature Use growler test probesCheck between armature core and the commutator barsIf growler lamp turns on, bars are groundedIf so, replace armatureTest the Armature for Open Circuit Use growler test probesPlace one test probe on commutator bar and the other test probe on the neighboring barRepeat this operation for all bars, moving one test probe at timeIf the growler lamp does not turn on, the armature circuit between these bars is openedThe armature should be replaced or repaired; open circuits most often occur at the commutator riser where coils are soldered(Burnt commutator bars are usually an indication of an open-circuit armature coil)
Brush Holder
Check the brush holder for insulation using growler test probesPlace one test probe on the insulated brush holder and the other test probe on the brush holder plateIf the growler lamp turns on, the brush holder has to be repaired or replacedA09E08A