I went out to my car today and was playing around with some junk.

But what I noticed was when I put the key in and turned it all the way just before the engine starts, I hear a relay click very quickly and loud, and my tach will go up to about 500rpm for a bit then it all just stops... the engine is never turned on.

I forgot exactly what relay it was, its in that little 3 cluster thing, not in the fuse box,

Any idea as to what this is??