Report "My 93 jeep grand cherokee laredo has a factory alarm that seems to be arming itself at times cutting the spark to injectors which enables car to start.When this happens I put key in passenger door lock and unlock and open and close the door and the spark comes back .I Called the dealer and they reffered to a security controll module could be the problem but could not tell me where it was located or what it does and if replaced does the dealer have to reset computer any solutions would be greatly appreciated"