I currently don't have my tach hooked up and would like to get it all set and ready soon. I blew up my oil pressure when trying to figure out wiring last time, and I have another one and a buddy of mine is an eletronic wiz and tried wiring it up with all new wiring and didnt get anything working, he thinks its a bad tach. He wired to the battery, distributor, and is the last one a ground? If anyone could show me pictures of the back of the tach if they got a spare to show where I need to wire it to thatd be great! Btw, tach is from diff camaro not original in my car.