The factory option security system started acting up on my 87 GN. The security light flashes all the time with the doors closed and unlocked. When the door is locked and closed the security light stays on all of the time and will not turn off. This is causing the battery a drain down. When I crank the car up the security light goes off. It's like the system is acting as if the door was open all of the time. Anyone know what the problem may be? Thanks.