[Lefty]

You don't need to splice anything. It'll just plug right into where your stock 99' harness is. Everything will plug in perfect.

 

[Lefty]

^ +1 it will go right into place i belevie you'll need to make new holes for the wing though?

Yes, if you didn't get the decklid with it.

 

[Lefty]

Yep, plug and play.

 

[Lefty]

It should be plug and play man. I don't know what's different about your car. Post up some pics with the wires.

 

[Lefty]

Hmmm that is weird. Mine and a some other's were just plug and play...

 

[Lefty]

mine had to be spliced but i only had the spoiler added to my trunk. Just use a test light and find out what is the brake light and so forth.

What wires did you splice?