2003 Ski-Doo ZX Series Factory Shop Manual, Page 89Get this manual
Section 03 TROUBLESHOOTING Subsection 05 (ELECTRICAL SYSTEM)
ELECTRICAL SYSTEM
SYMPTOM CONDITION TESTINSPECTION STARTER DOES NOT TURNNORMAL USE1Check fuseaBurnt fuseCheck wiring condition and replace fuse2Check continuity of starter switch contact pointsaPoor contact of starter switch contact pointsRepair or replace switch
The following chart is provided to help diagnose the probable source of troublesIt should be used as guidelineSome causes or corrections may not apply to specific model