Box Below the Engineer’s Side Window?

Trains Magazine Locomotives
1

What is the box just blow the engineer’s side window on this Ex-Conrail GP40-2?

Is it electrical equipment?

Thanks

Justin

http://www.rrpicturearchives.net/showPicture.aspx?id=2208974

2

Its Cab signal box it houses relays and decoders for Cab signal equipment

3

Chicago and Northwestern and the UP just put their boxes inside the nose in the toilet room instead of outside on the running board.

4

Thanks guys!