I'm having an intermittent issue with the KLD input signal that is on the T I/O Board. The signal intermittently goes low even though the 120 VDC is present on the T I/O board. I have swapped the T I/O board and the computer board with another car and the input still remains faulty. The only other thing I can think of is a bad back plane board but it seems unlikey because the input signal tends to fail only a few runs after powering up the controller. Would anyone have a schematic of the back plane board so I can trace the signals or does anybody have any other ideas that would point me in the right direction? Thanks.
