I have now installed an on demand TC lock up switch on my Toyota Previa. 
It was simple. For now I have a momentary switch and I will install a parallel toggle and a big red light. In my case, in order to trick the ecu, a 15 ohm, 25w resistor needs to be installed from the ECU TC wire to the ground. I have not done this yet but I don't have to worry about codes.
My thread is here: Freezing the Slushbox. Torque Converter on-demand lockup switch.
Thanks for the thread.
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Last edited by orange4boy; 09-08-2009 at 12:49 PM..
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