Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I discovered something bizzare. When I connect the multimeter to the ground and output (black and blue) of the hall sensor when power is connected to it. I can hear the spark when I rotate the flywheel. As soon as I take the multimeter connectors off it stops. It happens even with the multimeter off. On the continuity setting It only shows 0L even when the magent passes the hall sensor


Is this the hall sensor or something else ?