A very simple way to know if it produces electricity:
1. Before removing the car, crank the starter and rub one of the wires on the generator body. You will see if there is a spark. is visible, it can produce electricity; if you don't see it, it's not producing electricity.
2. The generator has been removed. Spin the generator with one hand (at the highest possible speed) and rub one of the wires against the generator body with the other hand. If you see sparks, it means it can produce electricity. If you don't, it means it can produce electricity. does not produce electricity.