Welcome to the forum. First off, I would recommend getting your hands on a service manual. They are relatively inexpensive. Mine, which could be the same for your model year, has very detail methods to check this issue. My speedo doesnít work either but my AWD drive does. There are several things it could be which is difficult to explain if you are references the service manual. Not sure if there is an online version. My AWD did stop working last fail and it was simply a grounding issue. One simple way, which wonít hurt to try, is to open the front cover on front the machine (the hood)...track down the small cables going to each front hub. These are the wires for the magnetic hubs. The brown wire are the ground wires. Cut/splice these to make your ground to the frame. Iím sure someone else on here can give further help on checking the overall wiring under the speedo and testing the magnetic coils in the hubs as recommended in a service manual.