Early Bronco

I have a new to me 21 badlands. I have a buzzing/ vibrating noise coming from the front left corner in the engine bay. It continues even when the engine is off. I don’t know what it is, if it is normal, or if is a drain on the battery. Any info would be appreciated. thanks

I have a new to me 21 badlands. I have a buzzing/ vibrating noise coming from the front left corner in the engine bay. It continues even when the engine is off. I don’t know what it is, if it is normal, or if is a drain on the battery. Any info would be appreciated. thanks