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1979-2004 V6 Mustang Tech Discussions

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Unread 03-26-2011   #1 (permalink)
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Default Noise Coming From Speakers When Car Is Running And Or Applying Brake

I have a 2001 Ford Mustang V6 with a original Mach 460 Stereo. When the car is running I hear a low pitch humming noise coming through the stereo speakers, The noise does not seem to get louder when reving the engine. I also hear a clicking sound coming through the speakers when I apply the brakes. Has anyone experienced this type of problem? Any help in correcting this problem will be greatly appreciated. Thank you in advance.
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Unread 03-27-2011   #2 (permalink)
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Hmmm Have you done any upgrades to your interior? Pulled the radio out for any reason?
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Unread 03-27-2011   #3 (permalink)
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Everything is all stock. I am banging my head trying to figure this one out.
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Unread 03-27-2011   #4 (permalink)
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Does this happen with radio, or cd, or both? What about with the stereo system on, but volume at minimum? If key is ON but engine not running, and you apply the brakes, which would activate the brake lights, clicking sound still happen? Humming sound?
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Unread 03-27-2011   #5 (permalink)
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It happens with both the radio and CD and while on low volume. It will also here the clicking noise through the stereo speakers with the car off and key turned to on position.
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Unread 03-27-2011   #6 (permalink)
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I'm thinking there is a bad ground somewhere?
 
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Unread 03-28-2011   #7 (permalink)
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I'm with Redlyr re: bad ground, and I was going to suggest check the antenna ground, but if the problem is with the CD player too, that kinda rules that out. So, this is going to be a bit of work, but pull the stereo out to access the power wire to the head unit, and feed it directly from the battery, using an inline fuse. Also ground the head unit directly to the battery Neg. terminal. Just run the wires out the car window for now, for this test. See if the problem is still there. This way you can determine if the problem is in the stereo itself or in the car's wiring. This is a tough problem to diagnose, but we'll find it.
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Unread 03-28-2011   #8 (permalink)
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Thank you both for your replies. I will try running some wires like you said. I will keep you posted. Your help is greatly appreciated.
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Unread 03-29-2011   #9 (permalink)
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i had clicking from my speakers too, but it was from the "my rate" device from Progressive insurance that plugged into the obd 2 port, it would start clicking for about a minute or so every once in awhile, it used cell phone towers to send info to progressive thats when it would click
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Unread 03-30-2011   #10 (permalink)
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Yeah, sounds like something is grounded out. I'd pull the radio and check all the wires and connections for any signs of overloading. Pull the fuses to.
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Unread 03-31-2011   #11 (permalink)
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HA!
I am sorry i do not mean to laugh, but i had that problem with my sn-95. It drove me CRAZY!!! I even disconnected my tweeters, b/c thats where it started.
It ended being a bad fuse or ground in the stock amplifier (I cannot remember which. But fuses are cheap and easy)
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Unread 04-01-2011   #12 (permalink)
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Default Alternator problem

I have a 99. When I installed an aftermarket hu, w/ a scosche slc-4 to connect to my Mach sound system, i started getting noise through the speakers after a few months. I was told that the diode in the alternator went out. I replaced the alternator and it fixed the problem.... for a few months. What is taking out the diode, and how can I fix it, before I waste another alternator?
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Unread 04-07-2011   #13 (permalink)
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There's always the chance that a new diode can fail too. So, if you have checked all the grounds on and around the engine, buy another alternator. I can't think of any other things to try, except that you might need a higher capacity alternator? I'm grabbing at straws here.
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