Some ideas of things to check:Jerry -
Instead, my switchboard/control panel lights up two other blocks in the yard whenever there is traffic on the "dead" block.
- somehow the occupancy detector is sending out the wrong data.
- the wiring for two or more blocks is too close together and the signals in the wiring for one block are being picked up by the wiring for another block.
- you have a short between two blocks. With my detectors if one of the gaps between the two blocks is shorted one of the blocks shows occupied.