There's no buzzer here. The only time I heard a buzzer was for the seatbelt, and that one came on only once during the last 2 years.
Don't you have a key-in buzzer?
How would I intstall the buzzer for the headlight? Any part number for Rusty?
Oh, if only it were that easy. When they put that in factory I think it accompanied a change from positive to negative ground door switches. Not a trivial change, in other words. I flanged in a small 12V relay powered by the parking light circuit that is in-line with the key-in switch. It fakes key-in when the lights are on. But a detailed examination of your car's schematic would show what was necessary. One ruined battery saved certainly would pay for the effort, IMHO. -- Jim