I didnt do that, both wires the blue and the brown only had 12 volts coming from them in the start or run, depending on the wire, in the diagram I have both of those came from the ignition switch, I dont know about the starter thing, I have had mine hooked up like this since July and I have no problems, this is going to a trigger in the 6al, so I dont see how that would back feed. I start my car every other week in the garage, as we have snow so I am not going to drive it, but I let it warm up to operating temp then shut it down.