When I try to use the power mirrors the fuse blows.

A common problem with a short in the mirror circuit is the wiring that comes from the body to the door. When you open the door you will see a wire loom between the door hinges. If the fuse blows when attempting to adjust either mirror it would be on the drivers side. If the fuse blows only when adjusting the right mirror check the loom on the passenger side. From bending back and forth it is common that one or more of the wires in the loom have broken and possible shorted together. That would be the first place I would start to look to find this problem.

Hi:
You should first examine the wire harness that feeds from door frame to the door. These get worn rub thru, and bare wires touching metal cause the fuse to blow. It can be on either front door. if they look good, find and disconnect the harness plug , one side at a time to narrow down the problem. Once you figure out which one it is, you are going to have to get at the units, and that involves a little door disassembly.