Thanks for your reply O.T.H, I did have an issue about 6 months back with the alternator, although I hadn't replaced the battery along with the alternator. I will get this on a tester. What baffles me is that it doesnt have any issues until iv been driving for 15 minutes. Makes me think I have a break in a wire or the cd changer face plate may be failing. I cannot find a thing on this at all, I will post how the battery test went.
Cheers 👌🏻