[Kevin Sevcik]

Are you certain it's that the Spike isn't working? If you've only tried it using the compressor class, that depends on the Spike and your normally closed pressure switch. It might be your pressure switch doing something funny. Does the compressor ever stop running when it "works" without the fuse in? It should stop when the pressure hits around 110, and it should be electrically "open". It should also be "closed" atpressures below 110.

Since I can't think of a reason the spike would stop working with power, I'm grasping at this straw of the pressure switch, which I vaguely think might read closed by default on an unpower sidecar.