I have a 2014 Terrain with 30K miles. It was our grandma's car that wasn't used much and has mainly been in Florida. Recently both aux ports quit working and also the shifter gear lights are not working. I have checked all the interior fuses and everything looks ok. Is there possibly a fuse in the engine compartment that I should check? I don't think the battery has ever been changed. Could it be the battery giving in? Everything else is running fine. Car starts. No other electrical issues that I'm aware of. Any advice would be greatly appreciated!!