2001 Ski-Doo Factory Shop Manual Volume Two, Page 217Get this manual
Section 06 ELECTRICAL Subsection 06 (TESTING PROCEDURE)
INSPECTION OF AC CIRCUIT ISOLATION
290 Models If AC circuit is not isolated from frame, headlamp beam will weaken
Grand Touring SE
YELLOWBLACK wire BROWN wire 65 to 80 ohms
Current Measurement Mach STDTECH PLUS
HIGH INTENSITY LOW INTENSITY BROWN wire BROWN YELLOW wire 0.23 minimum 0.13 minimum
INSPECTION
Disconnect regulatorrectifierConnect one digital ohmmeter probe (needle ohmmeter will not offer enough precision) to frame and other probe to YELLOW wire (2-RE-A)Measured resistance must be infiniteIf such is not the case, it means there is connection between AC circuit and frameDisconnect one accessory at the time to identify the faulty circuit
Handlebar Grip Heating Element
Resistance Measurement Mach STDTECH PLUS