Electronics Molex Wires... and where they go!?

Right, I'm new to all this and i'm enthusiastic as hell!! Don't get me wrong. I'll be sending a hell of a lot of stuff to the modders graveyard, but since most of my stuff is old and free I don't care... I'd do it again I tell you!!

The first thing i'm planning on doing is tidying up the PSU for my Full tower. So heres the question, and try to bear in mind that I have no electrics knowledge to really speak of. I'm ok at DIY so i'm not too scared but i need laymans terms!!!!!

The wires in Molex's (Yellow, Black, Black, Red) what are they? I mean like positive and negative and stuff?!?



Oh and i used the search button but got nowhere!!
Cheers.

 

Yellow= +12V
Black and black=negative or - or ground
Red= +5V

 

Cheers,

So if i was to use the LED molex mod for example, would it matter which ground wire I use?

 

Nope, both are the exact same.

 

Sweet.... now i blow stuff up!!!!!!!


BTW, i've been browsing a lot of mod sites/forums recently and Bit-Tech rules em all!!

 

There is info on powering stuff with the molex connector in my guide: http://forums.bit-tech.net/showthread.php?s=&threadid=27158

 

yeh i was just about to say that too ^^
i found it very usful

 

Very Very Handy. I actually understand most of that stuff too!

Cheers guys. By the way... I blew my first LED this weekend. I'm so proud!