I installed a shelby alarm system in my car, everything worked fine for a couple of weeks then the door locks started giveing trouble. When i arm the car which triggers the door lock the lock locks and trips back to unlock. this only started happening after a couple weeks after the install. check all the wireing and they were all fine. has anyone every herd of this problem with other alarms on the ford focus. the lock double trips and go back to the unlock position.