it looks like there are only a few wires in this ODBII plug and i have no voltge on any of the plugs. which of the plugs will have voltage. which wire will be 12v which will be 0v and so on. im buying the haynes manual tonite so i can see which wire goes where but it wont be until get of work at midnight. there is a diagnosis plug on the engine is this for a different type of hookup. maybe at the dealership only...