I have had a problem with my security system and it has not worked since I got the car last year. I got a used security module because when the secuirty sytem was on the light was steady and would not flash. Yesterday I finally had some time and swapped out the security module.
![Embarrassment](images/smilies/redface.gif)
Finally, the security light would flash and I was able to program the remote without a problem. They key is if the light flashes, I gather from my experience.