2002 Bombardier Quest 650XT Service Manual, Page 190Get this manual
Section 05 ELECTRICAL Subsection 02 (OVERVIEW)
GENERAL TESTING TROUBLESHOOTING INFORMATION
The following gives general electrical-related problemsFor specific system-related problems, refer to proper system sectionIt is possible that component seems to operate in static condition but in fact, it is defectiveIn this case, the best way to solve this problem is to remove the original part and replace it with one which is in good conditionIMPORTANT: When having to solve an electrical problem, the first thing to do is to check battery condition as well as its cables and connectionsAlso ensure the ignition switch is turned onCheck related-circuit fuse condition with an ohmmeter visual inspection could lead to false results and solidity (close to battery)Also visually examine harness and connectionsCAUTION: It is recommended to always disconnect the battery when replacing any electric or electronic partsTo perform verifications, good quality multimeter such as Fluke 73 (PN 529 022 000) should be usedPay particular attention to ensure that pins are not out of their connectors or out of shapeThe troubleshooting procedures cover problems not resulting from one of these causes