Buzzing noises and electrical problems with start up

[skeev88]

I have a 2007 that is giving me an erratic startup. The instruments go a little wacky with the power fluctuating in them, there is a loud buzzing coming from behind the tachometer and it takes a few cranks to get it started.

I was thinking that possibly the battery was a problem, but would that cause such strange behavior in the instruments as well?

 

[Mustanglvr2006]

I just recently had a battery that was dying and nothing like you have explained happened to me just the dreaded waa waa waa (thats a slow cranking sound BTW lol) click click click

I hope you figure it out