There is only one switched hot wire under the hood. It's blue, at ballast resistor, voltage regulator and alternator. So tapping this blue wire somewhere along its route to the alternator is typical. In fact, when the factory engineers added a electric choke assist to their thermal choke well, they tapped this same wire. The difference is how much current different electric chokes use. The factory installed a choke controller, mounted underneath the coil, but their choke heater was a like a small piece of electric range element. So... go ahead and wire your aftermarket electric choke to this blue wire assuming that it wont cause charging system problems. If it does we'll seek a solution. good luck
