Just curious if anyone has attempted to tackle this. I am figuring it isn't that hard. I'm an EE and hoping to figure something out soon. I will try to experiment with different reistors and such. My main problem is the heat build up as just wrapping a simple resistor in electrical tape wont work . I beleive u just need to get a 12v rated 6 ohm resistor and wire it in parallel with the led light.. i.e. have one end on the positive and one end on the negative. I"ve never actually played around with car resistors and such so if anyone has any experience it would be appreciated.