68 396 Camaro key buzzer

[RN]

Need some info on my buddies 68 Camaro. It has a dash mounted ign switch and I need to know if it had a key buzzer option? I ask because the horn relay buzzes under the hood like I remember the cars in the 70,s had with sterring column mounted ign switches only his is buzzing even without the key in the ing when the door is open and I did not think it even had the option which makes me think it has a ground problem since the dome lite is not working either! Any help would be appreciated. Thanks , Ron