Working on 74 440 auto, my thermoquad has an idle stop selenoid mounted on the right side, which is my understanding is how you set the idle, I am trying to find out where the plug end off of it hooks up at, I only have one wire out of my harness there, which should go to my A/C Unit, which should only get 12 volt when I turn A/C on,.should a constant 12 V off the ignition be going to the selenoid????