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      11-13-2012, 12:30 PM   #15
mistryn's Avatar

Drives: BMW 335D
Join Date: Oct 2011
Location: Mids

iTrader: (8)

Just thought I would update this thread -

Thanks Sam for help and advice made a lot of sense

This morning I plugged in my iphone via a phone > RCA plug adapter - Buzzing noise was gone. This led me to think problems with wiring fro back of HU to the amp - it picking up interference on the way

So I pulled out my HU, re routed the wiring loom under the passenger footwell rather than under the glove box - buzzing noise 85% gone. Then I re routed my earth wire as to makkans post above and did a bit of tidying up with wires. As a result 90% buzzing noise gone. I had a spare ground loop isolater (yes I know some of you will be shaking your heads at me) I decided to plug that in and buzzing noise 95% gone. You can still hear a very faint buzzing noise when on mute but not when volume on whereas before the buzzing noise was constant no matter what volume.

Thanks to everyone really appreciate your help

I will be typing up a mini how to if anyone is interested as I took some pictures along the way