When I turn the key to "ignition" position (when the dash lights come up), and while the car is running, one of my interior speakers makes a constant whining noise. If I step on the brakes, the whining noise gets louder. With the turn signal, it goes loud, soft, loud, soft in correlation with the signal going on and off. All the other speakers are fine. With the key just in the "on" position without the car running, there is no whining at all.

What's causing this feedback? I have to listen to my music loud just to drown out the whining and it's really beating up my ears.

Thanks HT.

 

I'm assuming that you have an amplified system, such as a low/high/mid range amp hooked up to your cd player/deck.

Check your rca cables, make sure there shielded, almost 90% of the ones now days are, but check any way.

Feed back is caused by an amplified signal, confused by picking up it's own current of supply, when it's not needed. (hold a microphone next to it's p.a, and you'll get the same result, but on a larger scale) Same principal.

Make sure that you have NO power leads or hot wiring near the rca cables. The cables (if not shielded well enough, it will confuse the signal, resulting in feedback).

Do NOT run rca cables or a hot feed cable or wire near the under dash fuse box, route to the opposite side or middle of the car under the carpet.

Check all of your grounds....they're just as important as your hot leads/remote wires.

If all is we'll with your rca's and your hot leads, you can buy a noise reducer at radio shack. It won't cut it completely out, but it'll help a great deal.

H.T.H
-Shadow-

 

Most likely your grounds. Describe to us in great detail how the amp is grounded.

 

Thanks for your response.

I didn't provide enough information.

My interior speakers are running straight off the deck and without and external amplifier.

I checked all the wiring and everything seems to be insulated adequately.

The only thing I can think of is that the battery is on that side of the car (it's my front/right speaker) and the amp for the sub is drawing power from the battery. But those wires are thoroughly insulated as well....

If it's an issue with the deck not being properly grounded, shouldn't the whining noise be present in all the interior speakers?

I am stumped.

Thanks again.

 

By the way thanks for the input and help.

I like to DIY, but I'm obviously and by no means an expert of any type when it comes to stuff like this.

thanks again.

 

Thanks for your response.

I didn't provide enough information.

My interior speakers are running straight off the deck and without and external amplifier.

I checked all the wiring and everything seems to be insulated adequately.

The only thing I can think of is that the battery is on that side of the car (it's my front/right speaker) and the amp for the sub is drawing power from the battery. But those wires are thoroughly insulated as well....

If it's an issue with the deck not being properly grounded, shouldn't the whining noise be present in all the interior speakers?
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It should, but not all of the time. Electricity is a finicky thing, especially D/C current, when dealing with engine noise.

Even if the cables/wires are not exposed (hint: just plastic coating) that doesn't mean that there insulated....make sure you have no speaker wires running near or on top of the hot wires/rca cables. And make sure you have a really good ground on your deck.....Not just a tight bolt or screw, use sandpaper on any surface paint where your ground is.....This also applies to any ground producing/receiving a signal.

Your remote wire to your amp and deck is also considered a hot lead....check that too.

-Shadow-

 

ok thanks again.

i guess i have to yank the deck out tomorrow and recheck everything.


UPDATE: spent all day basically redoing everything. the noise is still there. i think i'm going to give up.

thanks shadow




Modified by !xobile at 7:53 PM 10/7/2007