Can not get both sending and receiver's light to work. Sending sensor is OK. How can you test if a receiving sensor is bad?
Will check out the alignment of the sensors again.
The receiving sensor is the one that most commonly goes bad. If you have a friend or close neighbor with one you might try subbing with his.
I did install my receiving sensor again and made sure about the line up. It worked on the first try and saved $29. I must have hit the sensor after all, but memory is short. Thanks,ttm2ash2bbh2