2005 Ski-Doo RT Series Shop Manual, Page 185Get this manual
Section 05 ELECTRICAL SYSTEM Subsection 03 (STARTING SYSTEM)
If the solenoid does not receive signal and the start switch test good, make sure it is not bad connection between the engine control module (ECM) and the starting solenoidIf not, the ECM can be suspectedIf the solenoid receives current, test it as follows Disconnect battery and starter cables from solenoid Inspect connections and clean as necessary Solenoid condition can be checked with an ohmmeterInstall probes on large connectors of solenoid Measure the resistance when current is applied to small connectors; if it is more than few ohms, replace solenoidIf solenoid tests good, check the electric starter
A voltage drop test can be performed in order to find poor connection, defective wire or component, causing parasite resistance in the systemTo perform voltage drop test, proceed as follows: CAUTION: Do not active starter more than 15 secondsWait minutes between each testNOTE: Place probes to terminals not to the connectorsMore that one component can be defectiveRepair any defective component before performing the next testTEST Place the positive probe of multimeter on positive battery terminal and the negative probe on the high-current input of starter solenoid