I've seen several threads questioning the fuse panel, but haven't seen an answer. Does anyone know the usage for the 4 fuses, or know where to find a diagram?

My 4WD is out, hoping to start by checking fuses.

 

5 amp fuse is for the speedo,15 amp for EFI power,20 amp fuse is for ignition(chassis power)the 20 amp fuse on the end is for accessory items,controls any unused red/white wires in the harness.
On the awd connector make sure you have 11.5 to 12 volts with ignition switch on,in gear and awd engaged. If so,then check resistance on the awd coil wires themselves. Should be between 22.5 to 25.2 ohms. If all this checks out and you haven't changed fluid in awhile do this and see if it helps.If it doesn't then you could possibly have a mechanical problem in the awd system. What two items mainly had problems were the armature plate,but the most common was plastic roll cage damage.Either no awd,erratic engagement,or engagement even in 2 wheel drive mode. Items #10 and 26. Dirt Cheap Yamaha, Honda, Arctic Cat & Polaris OEM Parts & Accessories – Cycle Parts Warehouse