Need to wire up the TCC to the ECM.

Being that the truck was previously carbureted, it used the brake switch and a vacuum switch to lock up the TCC.

I'm not sure how the solenoid actually works so I don't want to assume anything, but here's what I have:

Two wires going into the connector on the tranny.

One is blue. As long as the ignition is on, there is 12vdc on that until the brake pedal is pressed. This seems to match up to the drawings.

The second is green. It comes from a vacuum switch that is operated by ported vacuum. When the vacuum reaches greater than 10", the switch closes and 12vdc is fed to the other pin of the connector going into the tranny.

Now, I am thinking I need to run A7 to a relay to provide a ground to the relay to turn it on, then feeding 12vdc to the green wire.

Make sense?