02 F4i: Took a look at the wire colors (still thinking about a HID change over) and saw that I have a primarily blue and a primarily green color wire set feeding each bulb. Which one is power? I assume the other is ground. My understanding is that the current HID kits are pretty much plug and play, soooo as long as I get the polarities correct I'm good? TKS

 

The green wire is the ground. Its also the ground on the f4i for a lot of other stuff too for future reference. Yeah you cant really mess up installing the hid kits its just two wires.

 

+1

and if you get the polarities mixed up its a 2 sec jump reversing them.

 

Thanks!