2020telly thanks for the information. Here are some photos.
Sorry, that sent prematurely. I’m not sure what gauge the wire is. Looks like it’s running through plastic tubes all the way up front though.Do you have pictures of what they installed? They should have put a fuse or an auto resetting breaker inline. That would prevent the wires from melting. The fuse should blow or the breaker trips before the wire melts. Maybe an exposed or stripped wire somewhere is touching metal possibly from pulling the wire through a small hole or rubbing? Any idea what gauged thickness wire they put in? I would think 12-guage would be enough to pass power without overheating. If they put a higher number wire then it would be thinner and that could result in it melting. If they put an inline fuse, what Amp rating is the fuse? The amperage rating on the fuse will depend on the thickness of the wire. For example, a 12-gauge wire might require a 20A fuse, while a 10-gauge wire might require a 30A fuse.