Are all the rear lights not working, or just one lamp (for example, taillight, stop, or turn signal)? I don’t think I should ask if you’ve had a detailed inspection and diagnostics of your truck. This can really happen and even very unexpectedly. You can contact mobile truck repair Denver , namely the company Mobile Wrench. My company contacts them when it is necessary to carry out a monthly inspection of all our trucks and they also do repairs. They come to you at the site of the breakdown and repair your truck. You can read more about their services on their website.