XR600R Electric Issue

Hi All

Need some advice pls?

I have a 98 XR600R. So no battery, everything electric runs off the motor.

The stator was rewound when I got it.

Everything is hunky-dory, but the lights stopped working

The bike still runs, no problem, it’s just the lights and electrics that don’t work.

What is the easiest way to check for the problem?

How do I check if the stator is poked?

Thanks
Bus