2008 Polaris ATV Predator 50, Sportsman Outlaw 90 Service Manual, Page 151Get this manual
ELECTRICAL Tether Switch Test
12Disconnect wires from switchConnect an ohmmeter across the two switch wires (DG and BKYE)With the boot installed, reading should indicate continuityReplace the switch if there is greater than .5 ohms resistance
ETC Operation
When the throttle is closed (idle) the throttle arm depresses small micro switch that limits engine rpmThrottle Arm
Micro Switch Switch
Pull tether boot from switch and check for an infinite) readingReplace switch if continuity exists
When the throttle lever is pushed forward the throttle arm moves off the micro switch and allows the engine rpm to increase with lever movementSwitch