The top on my 2005 Mustang quit going down. First, the rear passenger window motor died (slow death over a few years), and would not go down. I knew that would stop the top from working, and I replaced it. Now it works fine, but nothing happens after the windows go down. When I press the top down button, the windows all go down, but then nothing happens. Even the relays in the engine fuse box do not click (bought a new one to make sure they were not bad). I also filled up the hydraulic fluid, but the relays don't click and the pump never tried to come on. Could it be thee windows down sensors? How do I troubleshoot those?