Hi, I bought a ultrsonic parking sensor kit but I cant seem to get it working. I tryed adjusting both pots with no effect, and the LED indicator stays lit, I am pointing it in 3+ meters of empty space. Is there any way to test the ultrasonic sensors? I checked resitance, one is 748R and the other is infinite, so I assume that is dead? BUT if one of the sensors was dead then there would be no echo and the led should be off..?
