I have a 2007 660. I live in Kentucky and came back from a long ride. Cleaned the machine really well. All of the 4wd system was working. Went riding on thursday go to push the button and nothing, light doesnt come on no servo motor sound, flip the switch and push diff lock and the diff lock light comes on but still no electrical sound. I figured the servo was bad. Got in from work last night pulled the servo motor tested it and worked fine, so has to be a relay right, i have another 06 model so i pull the relays from it and still doesnt work. Put the 07 relays in the 06 works fine. So i go well has to be the switch, Brother in Law has a 08 model pull the switch and it works fine on his machine. Any ideas?