Hey everyone, I'm new on here and have a problem w/ the 4x4 on my truck that I'm hoping you can help me with.

I just had my truck in at a garage to replace the differential bearings on the rear axle. After bringing it back home, I noticed that the 4x4 does not work - the light will not illuminate on the dash either.

Anyone have any ideas what might have happened? All the fuses check out fine and relays don't appear to have sustained any damage. Is there any reason why the 4x4 system would have been disengaged when they were working on repairing the differential bearings?