So, I was installing a new aerial to support my new DAB headunit and somehow have now lost power going through from the ignition and the headunit won't power up. I've checked the stereo socket with a multimeter and I'm not getting a reading from the ignition source. I'm not sure if there is a fuse for 12v ignition source? Fuse number 45 is fine and I am getting 12v from the constant source. I wonder if I have broken a wire somewhere, if so, where else could a get a 12v ignition source from?

Check fuse 10 too.

Cheers, will give it a check after work 

Cheers man! Fuse #10 had blown. Easy fix