2002 Montana Van awd disabled

The all wheel drive deactivated on my van and the Abs light stays on.
I checked the brake fluid and the fuses, the fuse that's for the awd has no power running to it. The awd is definitely not engaging. Any help would be appreciated. Jim

AWD could be disabled if system detects a tire rotating at different speed , check tire pressures for one thing. Could be wheel sensor that is bad, I think same sensor is used for ABS and AWD