I have a 2004 mustang with the mach system in it. When I use the radio or listen to cds it off and on makes a constant buzzing noise out of all the speakers. Sometimes it's really bad and sometimes you can barely hear it at all (same sound no matter how loud the speakers are). Someone had suggested that it might be a bad unit so after the cd player jammed up last week I went ahead and replaced it with an alpine unit and it's still doing the same thing. Any ideas what it could be?

 

Try taking out a speaker and plugging in one from your home stereo or something. If there's still buzzing, you need to replace your wiring. If the buzzing goes away, you need new speakers.

 

You should try checking out the wiring to/from the amplifier on the trunk deck. Sounds to me like a positive wire touching the case of the amplifier or interfering with the signal input of the amp. The only way it would make that noise through the door speakers would be if one of the wires was rubbing the chassis(ground) which isnt likely. I'd say its your amp or the wiring to it. Check there first. It is definitely NOT your speakers.

 

THAT IS FUNNY......... SO FUNNY I HAVE TO STOP AN POINT IT OUT...........

Noise problems are commonly associated with bad cables and I think this is the case. If you were to get the noise from one set of speakers I would be inclined to believe it was a bad amp but since you get it from all the speakers I would think it is bad wiring. Try pulling the deck out and while it is on try to juggle and pull on the factory wiring going to the deck to see if you can get the bad connection to react to you moving it. If that doesn't do anything then go to the back of the car and do the same oporation to the cables going to the amps.

Of course we have ignored the simple solution that it could be a bad ground on either the deck or on the battery. Have you checked your battery cables lately?

 

Ok so when it did it today i reached up behind my radio from underneath the dash and jiggled the ground wire and noticed that it stopped the noise temporarily and then started back up until i jiggled it around again.. so i'm guessing its just a bad ground from the radio.. where is the best place to ground it?.. the cable is pretty short and limits where it can go

 

It may be the ground but is certainly a connection in the hrns. Take the deck out now and see if you can isolate which hrns does it, and then which wire. From there see if there is a way to ensure a better connection.

 

well I went ahead and messed around with it a bit last night and put the ground wire in a different spot.. so far it hasn't done it yet since then so i'm gona leave it for now.. if it happens again i'll go ahead and take the unit out and search wire by wire for the bad connection