leave power connected on our cord, but unplug it from the box and plug in the LPP supplied cord, then test the heads. this will rule out our cord.
you can also unplug the POWERsensenode, and this way you'll have direct battery power, so you can test it without starting the car.
then listen to the factory buzzer and look at the light. then move in front of each head and listen for the proper alert. if they are not working correctly, it's something in the LPP control box. if they are, it may be our LASERnode not sending the right signal for some reason.
if you have a digital camera, put it near each head, you should see the red dot of the diode pulsing when it is on.