Torque Converter Blackmagic "is it stalling me out"

I may be way off base here, it's been a while since I wired up a lock up; so forgive me if I'm full of hooey- and I don't have a relevant FSM handy to double check...
But from what I think I remember about the H transmissions is that the electrical connections are to bypass the convertor lockup and OD engagement (tow/haul switch), so you need to supply 12v to it in order to keep it from locking up- disconnecting it would simply allow it to continue to engage and disengage on it's own. So, you may not have eliminated the TC lock up from the equation by disconnecting it. Try supplying 12v to the trans connection and see if that prevents lockup.
Then again, I could have this totally bass-ackward and early senility is setting in...