2008 Polaris Ranger RZR Service Manual, Page 210Get this manual
FINAL DRIVE AWD Diagnosis
Symptom: AWD Will Not Engage 1Check the gearcase coil resistanceTo test the coil resistance, measure between the Grey and BrownWhite wiresThe measurement should be within specification5Check to make sure the coil is seated in the U-shaped insert that is pressed into the gearcase coverThe top of the coil should be seated below the U-shaped insertThe U-shaped insert controls the pole gapIf the top of the coil is above the surface of the U-shaped insert it raises the armature plate, thereby increasing pole gapIf the pole gap increases the coil will not be strong enough to engage the AWD systemIf this is found, replace the cover plate assemblyGearcase Cover Plate Asm
U-shaped insert
Front Gearcase Coil Resistance: 21.626.4 Ohms