A/c been working great, will not come on now. This is what I have already done.....

1. Fuse is not blown, 1 volt on power side... but if you put 12 volt on it get hot...
2. Clean fuse holder.
3. Jump fuse and everything comes on.. all blower speeds work, a/c comes on, but jumper wire gets hot.. short somewhere?
4. Change out climate controls behind glove box.. cheap $5.00 each junk yard, no change.
5. Try following wire diagram, does it pick up power from the key switch? What number, color etc... it looks like it leaves the fuse to a relay before climate controls...
6. Change fan reg, on front inside fender, still the same, $5.00...
7. Oh change the key switch months ago... everything work fine then...
8. So my questions is when it leaves the switch what does it go to next, relay, pressure switch a/c side..

Thanks for any advise....

Luckyme