Hauled a broken Blaupunkt CD/Tuner out of a friend's Astra and chucked in a new JVC CD/Tuner,using the harness connectors that were there already. Problem is,the JVC won't hold it's settings when the ignition is switched off,although it works fine when the ignition is on. I'm guessing the harness connector that was already there doesn't have the 'permanent live' that the JVC requires. Will it just be a case of buying another harness adaptor from Halfords ????