2003 Ski-Doo ZX Series Factory Shop Manual, Page 291Get this manual
Section 06 ELECTRICAL Subsection 06 (TESTING PROCEDURE)
Voltage Testing
1Connect probes to appropriate wires from trigger coil housingRefer to corresponding IGNITION and ELECTRICAL SYSTEM TESTING table in this subsection2Activate the manual starter and check values indicated by the multimeter3Repeat operation times4Compare readings with those appearing in the IGNITION table
6MPEM VOLTAGE TESTING
Liquid Cooled Models Only 1Disconnect the housing between module and high voltage coil2Connect multimeter probes to WHITEBLUE and BLACK wires coming out from modulePlace theselector switch to and the scale to 00.0 Vac
A32E12A
3Compare readings with those appearing in the IGNITION table
Voltage Testing
1Disconnect spark plug cap from spark plug2Fasten alligator clip to spark plug cable, near the spark plug3Connect other multimeter wire to engine (ground),then place selector switch to and scale to 0.00 Vac1 2