First the one post (S post) only has 12v when the key is in the Start position (thus the "S" label). It should be dead (as you said it is, with key in on position). sounds like the selonoid is wire and functioning correctly so far.
My first guess on the fuse box is you have the power lead hooked up wrong. IIRC, it's a yellow (may have a black tracer, don't have a wiring diagram with me at work), and should hook to the same LARGE post as does your + battery cable. All power to the fuse box and 99% of interior wiring comes from that one singal wire.
What makes you think your coil is hooked up wrong?
Instead of dinner ... just pay for a hotel so I can attend the show /forums/images/icons/smile.gif
If you always do what you've always done,
You'll always get what you've always got
http://www.classic-mustang.net/johnpro
http://www.classic-mustang.net/john66/mustang/pics/66fsides2.jpg
My first guess on the fuse box is you have the power lead hooked up wrong. IIRC, it's a yellow (may have a black tracer, don't have a wiring diagram with me at work), and should hook to the same LARGE post as does your + battery cable. All power to the fuse box and 99% of interior wiring comes from that one singal wire.
What makes you think your coil is hooked up wrong?
Instead of dinner ... just pay for a hotel so I can attend the show /forums/images/icons/smile.gif
If you always do what you've always done,
You'll always get what you've always got
http://www.classic-mustang.net/johnpro
http://www.classic-mustang.net/john66/mustang/pics/66fsides2.jpg