I am pretty sure that he the orange wire on the cigarete lighter in fourth gens is the postive wire correct? Sorry if this a stupid question, I tested it a while ago and cant remember exactly.

 

Yes it is.

I wasnt too sure atfirst when doing my screen install, but all turned out well.

 

use a multimeter ever?
i wouldn't wire anything without one...

 

good point, but I in looking at the cig I knew one was a ground (black wire) so the other had to be positive.

 

I have a thing with a light on it to test. The bulb lights up when there is complete circuit. I don't really know how to describe it. I know how to use multimeters from my days of RC racing, but I don't have one, I always just used other peoples because there were so many around