adding a wire for my electric choke.

I was reading somewhere that GM used a relay wired in so that when ignition was switched on but the car not started the elect choke would not get power to open. I think it was wired into the alternator circuit somehow, and would only get power for the relay, to energize if alternator was online, which would only be if the engine was running. Anybody else know about this one. Sounds like a good idea.

Matt