Packtronics How do i know they all work?


I guess you are referring to those traditional ultrasound based "visible" sensors? All rear sensors work simultaneously but those are only active at reverse or neutral. Front sensors are always active (at low speed).
You must have made some kind of a mistake with your test, if one sensor did not work, you would get the whole rear (front) disabled and two red "leds" shown for each side at the distance display.


