What is this (part 1) ?

I was inspecting under my stang yesterday and found that a nut was screwed in the blue object with a wire coming out of it....but the wire was spliced and exposed....i'm trying to figure out where it goes and what's its function?....doesn anybody know? Here are some pictures....thanks guys...

http://img28.photobucket.com/albums/v85/Boston_PuppyDawg/understang1.bmp

http://img28.photobucket.com/albums/v85/Boston_PuppyDawg/understang2.bmp

http://img28.photobucket.com/albums/v85/Boston_PuppyDawg/understang3.bmp

http://img28.photobucket.com/albums/v85/Boston_PuppyDawg/understang4.bmp

thanks for the help guys

89MustangGX said:

Oil level sensor. It turns on a little light in your dash when you're a quart low on oil.

Click to expand...

OH!!!!.....ok..*feeling dumb* that's why i wasn't able to tell but i check my oil all the time anyways....thanks man...