for look but also shift light if it has one and if you have a swap and want to rev higher than the 8grand ( stock ex ) but yea theres a few ways to do it . green wire goes to the dizzy cap it's the blue wire or you can tap it into your cluster i think blue solid wire as well founs in the 13 pin connecto on 96 to 00r . i always connect it to the dizzy cap, and the third find the blue wire in the fuse box, but yea red wire go to 12v, white goes to parking light (connect it to your clock or radio)black ground. i have done it in civics and integras, b and d series engine thinking it should be the same for your 02 ex