Ok so I got what appeared to be a plug and play kit

I plugged one end where the old 9006 bulb went and then plugged in the other end to the new HID bulb. Turned on the lights and I get nothing.

I put the old 9006 bulb in and it lights up when I turn the lights on. What am I missing here

 

The polarity is reversed. Plug the harness in upside-down.

 

Looks like you connected the wires incorrectly. The 2 harness from the ballast should be connected to the bulbs and the connector closest to the bulb should be connected to the OEM wiring. This should work once you make the changes. If it doesnt light up. Flip the connectors to the OEM harness upside down.

 

You're awesome! All installed and working, damn are these things bright!

 

Ding ding ding.

Had the same issue on my 250 and my 300.