so I recently bought a 1999 Polaris scrambler 500 and it seems like the 4x4 is always on. The switch is in the off position but still whenever the back tires slip, the front wheels engage. When I do put the switch on, the light doesn't even come on. I changed the hub fluid and the AWD is still always on. Anybody have ideas on where to start? or what wires should have power when the switch is in the on and off position?