Belt Warning Control 12V box

In my 1990 Integra LS I have this box to the right of the ECU under the plastic pannel.

What is it for exactly?
If it malfunctions what would happen?

I thought maybe it was for the accessory power. A while back the silver box was clicking.....it would stop clicking when I turned my dome lights on. I did find a bunch of water around the area at that time. Would it have any control on my ignition at all?

I have searched the site and the internet.


Thanks in advance.

thanks.