I took every piece of wiring out of the 2 944 I built. The only relay was the one to let the starter crank without the ignition on. There was a switch for gauges, one for ignition, one for fuel pump, one for altanator, and one for my cool suit.
I used switches that were circuit brakers too. That way if the circuit breaker popped I could see it and maybe reset it to keep going.
Mark