1999 Ski-Doo Factory Shop Manual Volume Three, Page 82Get this manual
Section 03 TROUBLESHOOTING Subsection 05 (ELECTRICAL SYSTEM)
SYMPTOM CONDITION TestInspection
OPTIONAL ELECTRIC STARTER DOES NOT WORK WHEN TURNING IGNITION SWITCHNORMAL USE1Check connection of BLACK wire (solenoid ground) in 3-wire housing coming from magneto (white housing)aCorroded andor loose connection(s)Clean andor retighten