New Radio fitting problems

muddle84

Hi Folks,

Got a new radio which I fitted today. Got it all in relatively easy. But when I turned it on I noticed that once it powers up there is a noise coming from the speakers. It is an electrical noise, something similar to what old phone chargers sounded like before you plugged a phone into them. Nearly like a feedback..

Does this point to something not being correctly connected or has anybody any other ideas what it could be?????????????

muddle84

Anyone?

TherapyBoy

Sounds like you might be getting interference feeding back through the speakers. Bring it to a professional & get the wiring checked.

Does the noise you're hearing change when you rev the engine?

muddle84

So when you say a professional are you referring to an electrician??

Do you have any idea what could cause this interference?

TherapyBoy

muddle84 wrote: »

So when you say a professional are you referring to an electrician??

Do you have any idea what could cause this interference?

Not a domestic electrician, an auto-electrician or someone who sells & installs car radios.
Interference can be caused by a bad earth or a live signal feeding back into the radio somehow among other things. Or it could be a fault in the radio itself. The easiest way to find & solve the problem is to bring it to someone who has experience with similar problems.

Does the noise change when you rev the engine?

muddle84

Ok I get ye. I cant do that though until ive convinced myself that I cant fix it myself!!! Its just the way my mind works!!!!

The noise is at a constant pitch no matter how I rev the engine. Could this be anything to do with the red and yellow wires that can be swapped in the new loom?

TherapyBoy

If the pitch doesn't change with engine revs it's probably not alternator interference like I thought.
There are too many variables. Without seeing the car & the way the radio is wired it could be difficult to nail down what's causing the problem. My advice is to bring it to a professional.

iamthemanwork

What is the make of your new radio and to what car is it fitted

muddle84

TherapyBoy wrote: »

If the pitch doesn't change with engine revs it's probably not alternator interference like I thought.
There are too many variables. Without seeing the car & the way the radio is wired it could be difficult to nail down what's causing the problem. My advice is to bring it to a professional.

Thanks for your help!!

iamthemanwork wrote: »

What is the make of your new radio and to what car is it fitted

It is a 08 Toyota Avensis and the radio is a Pioneer AVH-X3500.

This radio requires that you take a feed off the handbrake switch. Could this have something to with it?

TherapyBoy

Handbrake switch is just so you can't watch videos etc unless the handbrake is on. What is it connected to in the car?

muddle84

Yeah I figured that, it is connected to the wire feeding the handbrake switch.

iamthemanwork

To eliminate car or radio I would try and power up your Pioneer in another car or on a workbench.

muddle84

So I got the replacement radio and fitted it. No buzzing sound with the speakers on. The sound is alot better than the other unit too!!! Happy out!!!