I am looking for a relay that when it has no power on the activation side 12v passes through one terminal and when power is applied the relay throws and passes the 12v through a different terminal. I get confused when talking dpdt spdt ect. This is for an electric headlight motor conversion and all I need to do is switch the 12v from one wire to another. The headlight motors themselves contain all other relays, travel limits, etc. I intend to use the original 12v feed to the vacuum switch as the trigger to the relay. Of course a circuit breakerprotected battery feed to the switchable side of the relay. This way lights and covers will activate from the original switch. From some of the conversions I have seen they seem to add multiple relays that seem redundant to my needs.