I don't know if I can help, but I will try. I installed an '09 light on my KP.Mine is of the 9 volt variety.I didn't check voltage however when I did it. I just knew my model year would be 9v. The tail light is wired through the ACM (auto cancel module).So, on mine, I had to bypass the ACM. I posted the write up I used(which I aquired from another guy).Just search tail light upgrade.I think that will work.
I am not sure if your model year is supposed to have 9v or 12v to the tail, but I suspect that it would be 9v, since the upgrade comes from an '09.
I just reread your post.My old light('05), had 2 wires.The '09 had 3. So it sounds like yours is the same as mine was.
You may need an adapter to go from 9 to 12.Or do like I did and bypass the ACM.You may want to consult a service manual first though to confirm the voltage your current setup has.
'14 Ness XC
Last edited by Tarzan; 03-22-2012 at 10:20 PM.