HI There...so I just bought a 2007 mini Cooper s I'm trying to put a boost gauge in. When I pulled the rpm tach off an started tryin to find the right colored wires to use for power on an power off I only found 2 wires that has a constant 12v key on or off....I would like to have the lights. Come one when I start it... thanks again for your time an if anyone can help me out that would be highly appreciated!!