Hello,
I made t20 led using 12v g4 led. The g4 led is used for home lighting. G4 led is 12v and 2 watts. I will try to explain how I do it.

[Image: http://i.hizliresim.com/77ZO9Y.jpg]

I soldered 2 pieces of copper wire to + side. I soldered 1 pieces of copper wire to eksi side. 

[Image: http://i.hizliresim.com/l31LkE.jpg]

Then I used the piece of the old t20 LEDs. I connected the positive cables in parallel and there was no error in the car.

[img]http://i.hizliresim.com/VPYAl