What is this thing? I don't have a digi cam so i can't show you, but it's bolted up to the bracket that holds on the resevoir and has a BIG plug in it that is held in by another bolt. The main wiring harness in the front has a bundle of wires coming out of it that goes to it. I never really paid attention to it until i had to change the balancer last night and pull the radiator to get the puller in there.