uhambo24

Hello,
Having got bad reception from my Sony CDX-GT310 in a w reg fabia I've been reading here about installing a PC5-52, which is needed to power the signal booster built into the aerial (or something like that?).

I understand the reasons for it, and even where it goes (yes, I got that far all on my own!). However I don't have a clue where to plug the blue wire into. Obviously this has to go to 12v, and I guess it needs a 12v feed that's only on when the ignition is on or else it will drain the battery. However that doesn't really help me.

There are two wires in the back of the stereo that aren't attached to anything, they're both blue with white or silver dashes on them. One is just cut off and the other has a connector and a yellow tag saying 3amp max - doesn't look like the right connector for the connector on the wire from the PC5-52 though. Do I need to attach to one of them, or is there a wire in the dash that I need to connect to?

The car was in getting serviced yesterday and I asked them to fit it. Which they claimed they did. But I had a look and they connected up the inline aerial bit but didn't bother to connect any power to it. The blue wire is safely wrapped up in electrical wire instead of being plugged in! Not sure I really want to take it back to them, and as you can tell, I don't really know what I'm doing, so some gentle guidance would be greatly appreciated.

I'm quite capable of joining wires together - so long as I know which ones!