Ok so I have some computer cathodes thats are just laying around. I was just wondering what colours correspond to what for the cig wiring. I want to hook the cathodes up to that for power and then hang them under the dash.

 

One is blue/white and one is pure black. What one is 12v and what one is ground?

 

Black is ground

 

are you positive?

 

I umm touched the wires together and now my car wont start. it powes on though any ideas?

 

Well it sounds like you touched the positive and negative together ( blue/wht =12v and blk=ground) The blown fuse may share the same feed for Ignition or starter solenoid. What year car are you workin on?? Check all fuses.