I just replaced the ignition lock cylinder for my 99 Regal. The job went relatively smoothly except now I have a problem with the security light. When I start the car, the light goes out. Once the car reaches exactly 5 mph, the light comes on and doesn't go out again until I shut off the car. I don't have any issues cranking the engine, the engine doesn't stall or any of that stuff people sometimes run into with a funky security light. I'm just at a loss as to the correlation between the light coming on and a speed of exactly 5 mph. Anyone have any thoughts on this? Thanks.