[cdawzrd]

We lost two relays to the compressor, until we decided that the 120psi pressure switch is crap and switched to the TI analog pressure sensor we got a few years ago. Now that it's fixed in the program, it works fine. We had the compressor stuttering on and off due to a slight air leak (don't they all have slight air leaks?) and that stupid switch. The relays we lost didn't work (!!) when we replaced the fuses with more 20a ones, although we didn't try the AR breakers. The relays act dead, even though there's no evidence of damage (these are also the relays that fall apart, so we got a chance to see the internals--no evidence of "magic smoke")

Re. Russel's idea:

Keep in mind, you wouldn't be able to unhook the Spike from the ground, since its internal circuitry that drives the relay draws some power.

Aside from that, it seems like it might be legal. I don't know.

What would be easier, look at the relay outs on the RC. you see that the pins are labled Gnd, Fw, Rev. I forget which one, since i don't have aRC with me. You could simply spread apart your pwm cable somewhere in the middle, then cut the wire for Reverse. That would also make it impossible to reverse the compressor (unless someting is connected backwards) and I think that would be more legal than rerouting the 12v current. I would put male/female insulated spade connectors on each side of the PWM cable you cut, so you can plug them back in if needs be.

Jonathan