94 Cobra won't start- tried many things

Howdy all, the day that I might sell my cobra, it won't start. Funny, eh?
The car usually starts and runs perfectly.

When you put the key to the start position, nothing happens... in the on position, the fuel pump primes, the dash lights come on, all looks and sounds normal. But when you go to the start position, nothing.

Here's what I've done:
-hooked up to another car (battery)
-checked the 3 40a fuses (and all the other fuses in the engine compartment)
-checked the starting relay
-replaced the ignition switch

Here's what I've learned:
-the clutch switch works fine
-the path from the white/pink wire (starting relay wire) coming out of the ignition switch (which goes through the clutch switch) to the starter relay (in the fuse box) is good- no problems there

The problem is that there is no power coming out of the white/pink wire when I am in the start position. So, it seems to be a problem before the ignition switch. I've probed all the easy wires on the ignition switch (closest to the steering wheel- fat yellow, fat yellow, fat gray, skinny yellow) and they all have power at the 'on' position.

So, what feeds the ignition switch power?

I have to get this guy up and running tonight for the possible sale tomorrow!

thanks!

I can hotwire it- that is, clamp +12 onto the white/pink wire coming out of the ignition switch, with the key in and on the 'on' position and it fires right up like a good car.

I've studied over the Hayne's starting wiring diagram- I don't see what I'm missing.

I could install a 'push button starter'... heh...

so whatever feeds the ignition switch power to the starting circuit is not working. What is that?

Anyone got a pinout of the ignition switch? That'd be cool. I have a listing from the haynes manual, but it doesn't really say where they go, or come from...

Pictures. I took apart my stock one to see where the power was coming from.

Wire B4 seems to power the STA (starter wire- goes to the starter relay).
I have power to B4 in the 'on' position. when I go to the start position, no power.
You'll see in the dissected picture that B4 has that extra long tab, which would connect it to the STA terminal.

Here are some huge-ass pictures.

http://hunterhicks.com/ebay/igBoth.jpg
http://hunterhicks.com/ebay/igInstalled.jpg
http://hunterhicks.com/ebay/igJustInsides.jpg