Make sure your test your battery or replace it with a "known" good one before buying a new one. I saw your test above and it looks like you covered that.
The power steering will shut down if the system is not getting the correct voltage.
This happened to me last August and it was Alternator that need to be replaced.
Did I understand you correctly? You did the clutch in one hour? That is fast!
The starter has 3 wires, make sure you reattached all three the small one on top is easy to miss, it goes to the starter solenoid.
Here is some links that may help. The first two are pictures of the wires going to the starter.
