Buzzing in dash somewhere

[Mac442]

Please help with some insight before I go insane! I've had this buzz for a while and can't find the source. Only occurs when running. Can't even hear it with the door open (over the exhaust) but it drive me nuts when cruising around.

I've disconnected ALL fuses one-by-one and no luck. Even removed the gauge cluster, checked that it's not coming from the speakers etc. Is there a hidden relay under the dash somewhere? I do have an MSD box with a noise suppression filter, but there is no buzz coming from the box itself.

 

[Mac442]

Also wanted to add that I checked the coil too. It’s insulated and only gives off a very faint hum.

 

[83StreetMachine]

Is the blower motor running?

It could be the key buzzer or seat belt buzzer under the dash

 

[pontiacgp]

 

[Mac442]

Is the blower motor running?

It could be the key buzzer or seat belt buzzer under the dash

Did the 442s have seat belt buzzers? I don’t recall mine ever having one?

 

[Mac442]

Haha pretty much. I feel like the guy who is going to burn his house down trying to kill some bees.

 

[pontiacgp]

unplug the blower at the blower to see if the noise stops

 

[oldmansmonte]

That is odd. Blower motor or interference from the ignition system making it into the speakers.

 

[Mac442]

That is odd. Blower motor or interference from the ignition system making it into the speakers.

I disconnected the speakers and the blower motor too! I'm stumped!

 

[pontiacgp]

do you have a clock in the dash?