Compressor Won't Turn on In Weirdest Way

[V.M.Santore]

Hello Chief Delphi members!

Today at our warmup day for one of the MAR FRC competitions, we ran into a major issue; our compressor won't turn on.

While this may seem like something simple at first, we are having massive troubles being able to get it back on. When we left our shop, our robot worked flawlessly, compressor and all. When we get to the competition, suddenly whenever we enable the robot, the compressor won't turn on. Literally nothing has changed on the robot.

We narrowed it down to the fact that the spike relay wasn't receiving any signal to turn on, but from there we are stuck. The code worked previously and hasn't been modified, we swapped out the ribbon cable, spike relay, cRIO cartridge, and digital sidecar, but nothing can seem to get it to turn on, with the exception of the extremely brief moment when you plug the ribbon cable into the digital sidecar while enabled. Does anyone have any advice or input? We all would really appreciate it.