94 Nissan Sentra Headlight won't turn off

Make - Nissan
Model - Sentra
Year - 1994
Mileage - 167000
Engine Size - 1.8L

My 94 Nissan Sentra passenger side headlight stays on after the lights have been turned off. I've tried disconnecting the battery and reconnecting it, but the headlight remains on.

Any help diagnosing the cause would be appreciated.

Thanks,
Dave