adding a wire for my electric choke.

I do that kind of thing with the micro controller in my ignitions and engine management systems. Power relay is kept alive if timing sensor signals are present, if not the power is disabled. Power enables again if sensor signals return.

I am only familiar with Bosch alternators with internal regulators, the warning indicator could be used to drive a NC relay. If engine is stalled, the indicator circuit would disable power. The Bosch needs a 2W load powered by swiched ignition supply. The indicator circuit, triggers the alternator to start generating after a short delay. Without lamp, the delay can be long, or it may not trigger.