got no power at the fuse box for the heater blower

Have you tried to make a jumper wire from another fuse that has power to the one with no power? Try that and see if the blower will work. If it will work, that may be the only way to make it operate until you remove the fuse box and check for a broken connection. I know it's not the proper way to fix it, but if you live where it's cold, you need your blower.

Thanks will try that. Is it easy to remove the fuse box with out disturbing the wiring

I have never attempted it. I used the jumper but just left it. Truck was old so I wasn't really too worried.