Reset factory installed car alarm 1999 ford contour?

To reset the factory-installed alarm on a 1999 Ford Contour, first, ensure all doors are closed. Then, insert the key into the ignition and turn it to the "On" position (without starting the engine) for about 10 seconds. Next, turn the key back to the "Off" position and remove it. This should reset the alarm system; if it doesn’t work, consult the owner's manual for further instructions or consider disconnecting the battery for a short period.