2003 Polaris 3 PRO X Factory Service Manual, Page 288Get this manual
ELECTRICAL TPS (Throttle Position Sensor) TPS TestingContinued
4Install test harness connector on TPS
5Insert red voltmeter lead into yellow terminal, and black lead to black terminalSlowly open throttle and check for smooth voltage changeNOTE: The fluke meter will change scales and show O.Lmometarily when throttle is opening