I done mine yesterday on the 94. I had no choice because the 93 mirror only has one main plug and the 94 has the same but also has an additional plugin that you can actually get to. With the 93 mirror already being black, I thought I was done but once it was in, it would only move back and forth, if I pushed down, the mirror would turn blue and pushing it up, it done nothing.
I took out the three bolts that are mounted to the mirror, removed the phillips head screw from the bottom and everything comes right out fairly easy. Now I have my 94 insides put into a 93 mirror shell that was nice black and shining where my 94 mirror shell was a little faded on the top side. Now I have the back and forth and up and down movement back again and no mirror changing into a blue color. Simple job!