Should car still run on alternator with ground terminal off battery?

cudascott said
Car will not run with the ground cable disconnected from the battery never. A method known to check the alt. is pull the positive cable. The best method is to Use a multi meter
to check for charging voltage from the alt. by first checking the volts at the battery with the key off and no lights or accessories on then star up and check again if the alt. and it's components are doing their job you should see around 14 volts on a charged battery while the engine is running

Thanks for the clarification. I always heard it was the ground cable. Confuses me as to how the positive cable kill switch works on my race car then.

And rusted wrench, I did search for alternator test. Got nothing. Referenced a 1978 above. Stock dodge street car. If that is even relevant to the cable or magnetic field test I asked about. Thanks so much for the valuable input.