Like I said, mine has been on my truck a long time, 3,4,maybe 5 years. It was plug and play. I never had an issue with the brake light part on the assembly, but he cargo light part has a mind of its own. Some times, only one side will light up, and other times they both will. If I pull it off to fix it, they both work then. I almost never use the cargo light, so I just gave up on fixing it. As long as the brake light work as it should, that is all I care about. Point is, these things aren't always the best parts you can buy. IMO I would send it back too.