77 300d flashr issue

[blackestate]

on this 77 300D (W123) then I turn on either turn signal, or the hazard I get a buzzing from under the hazard switch.
All lights work except the left dash arrow, no blink, just buzz.
Sounds like a flasher to me?
IS this part of the hazardswitch, or just causing it to buzz, and is located somewhere else, if so where,

thanks
Doug