Alarm switch - Rear window

[Rare1]

Where do I find the switch on my -96 GTS, and how do I check if it is working/how do I make adjustment?
Thanks!
Mikael

 

[David Jenkins]

It's on the left lift glass strut. Easiest way to check it is to set the alarm, wait for the second horn chirp to insure alarm system is armed, then using the key, open the rear glass. If alarm sounds, it's working. dj