2007 Polaris Sportsman 700/800/800 X2 EFI Service Manual, Page 354Get this manual
ELECTRICAL Differential Relay Operation
The AWD switch must be turned to TURF' mode Speed must be below 15mph and transmission must not be in Park' 12Vdc is constant at the differential relay ECU senses grounding on pin #26 from the AWD switch ECU grounds pin #13, activating the relay Relay powers the differential solenoid System must be grounded to operate
X2 SPEED SENSOR
Testing
Using the special tools listed, test the speed sensor according to the tester instructionsRemove sensor and inspect the o-ring seal for damage or wear and replace as requiredReplacement of sensor is required as it is not serviceable
Differential Relay Testing