green box is clicking ...??

[eklips3]

sorry if this has already been covered but i tried to search but i got no result.

so on my car , 92 240sx. there is a green box in the driver side corner of the engine bay beside the clutch master cylinder.

anyways after every 9 seconds it makes 2 clicks.

i have no idea what this green box is or why its clicking. It used to never do this but then again the car has been sitting for about a year and a half now.

thanks guys.

[DJDANGER24]

green box in 240sx - Google Search (http://www.google.com/search?rlz=1C1GGGE_enUS358US368&sourceid=chrome&ie=UTF-8&q=green+box+in+240sx)

[TheRealSy90]

After mine clicking for a couple weeks, I figured out my wiper switch was turned on...