2010 Polaris Sportsman 850 Service Manual, Page 331Get this manual
ELECTRICAL SPEED SENSOR
Vehicle Speed Sensor
The vehicle speed sensor is mated to the transmission housing and reads the speed of the transmission output gearBattery voltage is supplied to the sensor on the ORANGE circuit and is energized when the OFFRUN and ignition switches are in the RUN and ON positionsTo test the circuit: 12345Turn the ignition key to the "ON" position and move the OFFRUN switch to "RUN"Verify there is battery voltage present on the ORANGE circuitIf voltage is not found, inspect the ORANGE splicescircuits, LH control assembly, and ignition switchIf voltage is found, test the BROWN ground circuitVerify there is continuity between the circuit and chassis groundIf all circuits function, remove the speed sensor from the transmissionVerify the sensor is not damagedTest the speed sensor using the following tools: Hall Sensor Probe: PN 2460761 Static Timing Light Tool: PN 2871745 6Connect the tools together as shown belowInsert the sensor probe's terminals into the speed sensor as follows: WHITE wire into pin BLACK wire into pin RED wire into pin A