Buzzing from one speaker
 

Hi everyone.

I've been having an intermittent buzzing noise from my right rear speaker (both the tweeter and the big one) on and off for a few months. It comes on when I turn the lights on and its quite loud. If the light are off you can hear a very slight whine from the engine revving through the same speakers but it mainly the lights. I can get the noise too go away completely by restarting the engine but even that does not work anymore or the interference will come back quickly.

I had a highline system fitted when I bought the car a few years ago but replaced it as the DVD unit was dead due to a leak from a rear seam leak. So I fitted a Pioneer F77DAB by running a set of ISO leads all the way to the boot (tourer) and using a BMW adapter to wire into the loom in the boot so that the amp would still send a signal to the factory fitted sub. Everything has been working great until a few months ago now loads of intermittent noise. I can usually get it to go away by restarting the engine sometime takes a few go's.

I was thinking of replacing the headunit but would like some opinions before I do that as I like the headunit.

Cheers.

Have you checked the wheel well for water?

Yes not had any issues with leaks for a few years.

Thanks.


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You say you re-used the existing amp (HK amp?), might that have suffered form damp? Lead solder as used on PCB tracks can develop conductive 'whiskers', perhaps the amp has developed these lead 'whiskers' and these shorting tracks is causing your issue..

Managed to fix it. As I pulled the head unit out with the ignition on and lights on to hear the buzzing it stopped as I pulled it out from the dash. I couldn’t find any loose or frayed wires tidied the wires up and put back. So far so good.

Not sure what the cause was.


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