Just bought this, few things wrong with it. First is the gas tank leak, but that's fairly straightforward as a fix and I can do that. Loose shifter, shifts into gear find, but you cant tell what gear you're in by looking at the shifter, like when it's in first it looks like it's in neutral or 3rd. Cant tell at all. And then the interior lights don't work, exteriors work fine, and the dome light works, but the interior lights don't work, the seller said it happened when he installed an aftermarket CD player. Any idea how to get to finding the problem? It's not a fuse.