What is the name of a default closed switch?

I have a 2005 Ford Excursion. It has a parking sensor which beeps when it senses something close to the rear bumper. When pulling a trailer, it beeps every time I put it in reverse. I can turn it off, but it turns itself back on each time I shift into reverse.

My brake controller wiring harness knows when a trailer is plugged in. I would like to tap into this wire, and when it is hot turn off the parking sensor. When I don’t have the trailer, I would like the sensor to work as normal. I prefer not to have a rocker switch because I will often forget to turn it on/off.

What is the name of the component I’m looking for? I want the parking sensor wire to be closed when the input is 0V, and open when the input is 12V.