95 Millenia. Alarm goes off by itself! where are the sensors?

1) I got into a fender bender. 2) car gets fixed 3) they steam clean my engine too. 4) NOW, the alarm randomly goes off...only in the day time...like it needs to warm up or something. I removed the control and power cables from the keyless box in the trunk...but it still happens. I had to remove the fuse (room fuse inside the car) to keep it quite. If I knew where the sensors are then I could check them...especially if there is one under the hood. any help would be great.. thanks

i cant believe it, the exact same thing happened to me on my 97 millenia 1) I got into a fender bender. 2) car gets fixed 3) i dont know if they steam cleaned my engine too. then my alarm always goes off for no reason, after a month or so it stopped doing that by itself, now everything is ok, no clue why it does that.