Problems with ignition, ect.
 

Not sure how to explain this.
When I take the keys out of the ignition, and open the door I get the same alarm when you leave the lights on or when you leave the keys in the ignition. Also when I take the keys out, I get the alarm and I can also roll down my windows.
This has just started, I just bought the truck about 3-4 months ago, and it was fine. I'm not sure if this would cause a problem, but some one has put an aftermarket alarm on the truck,which is wired up to the door locks. But that has been disconnected by the dealer, because the battery ran down, and they thought the alarm caused it. Even though that was the original battery in the truck, which is a 97.
Any help would be great.
Chad.

Problems with ignition, ect.
 

Can anyone Help?