the 4 wire.red for ignition +12v,orange for +12v battery,black for grounding and white for tacho input. The 2 wire socket for shifting light.Becoz it using led type be sure you connect this 2 wire correctly.Otherwise it won't light....
sorry for the mistake.......
i got the 12v LED thingy which meant to install at undercarridge car like neon... i try to read thru neon thread, but i found out there's still soemthing diff like ballast, i dun think the LED nit it rite?..so dicide...