[99redsilv]

you can get switches at electronics part places that act like contacts so that when the bed cover is open the circuit would be and the light would come on, and when it is closed it turns the light off..


wiring an alarm into it would almost be impossible, you could just get a tonneau cover sensor for your alarm.

 

[99redsilv]

the tonneau covers are more like pressure sensors on doors, then the tonneau is closed it pushes the pin in and when it opens the pin springs out and sets the alarm off