I recently picked up a '90 Cougar 3.8L v-6 LOVE it. I replaced the
factory sterio and after about 5 minutes of driving and listening to
how great it sounded (still stock speakers) The radio and digital dash
went out together compleatly. They are not on the same fuse, but I
pulled every fuse anyway, and they are all un-blown.I have been all
over the internet and found no help (although I did find someone who
had the same exact problem no one answered him).  I am thinking ground
wire only because they are so close to each other and on different
fuses. I am clueless with the electricity. I bought the Chiltons
manual but it doesn't have the wiring diagrams for the interior. Can
anyone help?