I've had my car for awhile now and I was reading up on the overdrive trannys and it said something about having a 12 volt source for the converter to lock up and I'm pretty sure mine doesn't, I don't think it's even plugged in cuz it doesn't have the computer anymore , do I need this hooked up, it runs good so what does this actully do, what wires do I need to have a 12 volt to