[Bryce Paputa]

That is what the router is supposed to do, the red light signals that it is booting up. I assume you mean that it doesn't work when you enable the robot right? When you turn the robot on it shouldn't do anything at all until it is enabled. Other than that, it's probably either an issue with the wires and connections going to the spike and and pressure switch from the digital sidecar, a programming issue, or an issue with the pressure switch itself.

Try temporarily shorting the leads of the pressure switch while the robot is enabled, if this turns on the compressor, then you have a bad pressure switch. If that doesn't do anything, then make sure that the wires and their connectors are good and plugged in to the ports specified in the programming.