buzzing noise coming from dashboard?

i have a buzzing noise coming from in the dash of my car whenever the battery is connected!?! can anyone help?? thanks kieran

Check your Hazard light switch, i've had two go on me, and they both buzzed when they packed in. :dontknow:

Faulty oil pressure sender/warning buzzer?
Lights 'on' warning alarm?
Blower Fan running?

thanks i will try it later.