I humbly need help! Buzzing noise seems to be coming from behind cigarette lighter in wires? 72 cutlass supreme. I've disconnected radio. Should I try pulling fuses to find it. I'm an old rookie 😁

 

Where is the horn relay located on a '72? It has an ignition key buzzer built into the relay assembly. Seems I recall someone posting that on the '72 it is on the center of the firewall, which would be about where you say the noise is.

Also, the mechanical voltage regulator is on the firewall in that general area, and sometimes they make a buzzing noise.

edit:
I found this picture of the firewall on a 1972 Cutlass and it shows the horn relay is adjacent to the voltage regulator:

https://classicoldsmobile.com/forums...pdates-132394/

 

Thanks, I'll look into that. I've got the clock out and I installed some led 194 lights in my gauges. So maybe leds causing it 👍