whine noise now in radio

[BGDUMMY]

All of a sudden I am having a whining nosie in radio, like

a gasser. The pitch changes with the push of the pedal.

Have not done anything to truck, etc.

Where is this coming from and why all of a sudden?

Any help would be appreciated.

Thanks!

 

[Kry226]

I have always heard that engine noise over the radio was a result of a bad ground somewhere. I'd say that's a good place to start.

 

[BGDUMMY]

Engine ground or radio?

 

[Dane]

Either, check the engine to firewall first

 

[GBaines]

Check the alternator

The alternator and its ground can be a source of electrical noise that varies with engine speed!

 

[Grey Wolf]

Sounds like you may have a bad Diode in your alternator... ... .

 

[LightmanE300]

Alternator - I've had it happen on 3 vehicles as soon as I started adding amps and higher performance stereo equipment. In some cases it's a bad alternator, in others just too much draw and you need a capacitor etc. .