Hazard Flashing Warning Light Unit problems of the 2005 Chrysler Pacifica

Purchased the car Aug, 2014. Previous owner also had same issues. Has been in shop several times, unable to pinpoint cause/remedy situation. Seat controls do not work, remote keyfobs do not work, interior lights, head lamps, no electrical function present unless key is in ignition, in the "on" position. When shutting off the car, all lights on the dashboard light up and the only way to shut them off is to push on and then off the hazard lights. This will cause all electrical to go out, including the head lamps and all interior lights. If you do not turn them off by using the hazard lights, it will kill the battery. We have replaced the fuses in for the seats several times. They work for a bit and then blow out again. The mechanics have gone as far as to replace the wiring assembly and still no remedy. I don't know how there is not a recall on this vehicle.