I have a 2007 Ram 1500. I few months ago I installed a new head unit along with an amp to power two subs and a second amp to power all of the speakers. Everything worked great. I recently noticed that my rear door speakers were not working. (I think they worked after the initial install but im on 100% on that.) Assuming that I had blown the factory door speakers in the rear, I replaced them. After replacing them, they still do not work. I double checked my wiring and it all appears good. Any trouble shooting help is greatly appreciated.