[PhilBot]

Originally Posted by rsisk

Brown + (connected to red power connector on PDB)
Blue - (connected to black power connector on PDB)
White to the white wire of a PWM connected to the digital side car
Black nothing

The green LED is on.

No matter where we place the sensor in relation to the gaffer tape, and no matter how we turn the adjustment screw, we never see an orange LED on the sensor.

Based on your description, it would appear that the sensor is bad. With just the brown and blue wired you should be able to get the orange light to come on by spinning the adjustment screw.

My question is: have you tried the other two sensors? One bad sensor is possible, two bad sensors is highly unlikely. Just hook up Brown and Blue and mount them looking down. Ensure the lights change before hooking up the white.