Electric choke issue

WHAT YOU CAN DO in these types of cases Get yourself a BIG wattage 12V lamp, like an old headlamp or an 1157 or even a dome light. "Rig" it with a socket and pigtails. Disconnect battery ground and wire the lamp in series. Now you can "short anything" and all that will happen is that the lamp will light. You can then troubleshoot without burning it down

Suspect the alternator connection, any stereo, and obviously ANY other load that is not key switched. Headlights, brake lights, the 4x hazards circuit, anything that is "hot" at all times.

Also take a look at the battery cable/ starter connections, any possibility they are "turned" on the studs and jumpered across?