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No sound from speakers when tested for polarity

Hello, I tested my rear car speakers with a 1.5 v battery (new battery) and nothing happens no noise no nothing could the speakers be blown if so shouldnt they make at least some kind of noise

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You must have a loose connection somewhere
even blown speakers make some sound

Posted on Feb 01, 2009

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Posted on Jan 02, 2017

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Rear speakers on my 02 chevy Malibu not working don't know why iv tryed everything when I bought the car it worked and then out of nowhere it stoped working


If the radio fader is adjusted fully to the rear and there is no sound the speakers and wiring should be tested.

Best way of testing is to remove the radio to access the wiring to the speakers. Identify the pairs of wires to the rear speakers and apply a 9 volt battery to each pair. If the speakers and wiring are good they will make some noise and the fault will be either the connection to the radio or the radio is defective.

If no noise is heard when applying the voltage, the rear speakers should be accessed, disconnected and tested in the same way. If you have noise it is the wiring at fault. If no noise the speakers are faulty.

The result of testing can be verified at every stage by using a known good speaker and a couple of micro jumper cables.

Feb 25, 2017 | 2002 Chevrolet Malibu

1 Answer

No sound from rear speakers Kia Sedona 2005 Front work fine with full sound but nothing from back speakers


Assuming the radio has an output for rear speakers and it is connected to them and you have selected the front/rear fader and attempted to adjust it to the rear, you can't do much more without removing the radio and checking the connections and the wiring to the rear speakers.

When I am faced with this problem I disconnect the speaker wiring from the radio and using a 9 volt battery and two lengths of wire I test the speakers and the wiring by connecting to each speaker in turn. A good speaker with good wiring will produce noise when the 9 volt battery is touched to the terminals. If there is no noise the speaker or the wiring is defective.
If all tests ok then the radio is probably faulty. This can further be tested by connecting temporarily to alternative speakers.

Jun 13, 2016 | 2005 Kia Sedona

1 Answer

I am trying to get the rear speakers for my clarion stereo to work. I found where they were wired to an amp at one point. I put in a new amp and the input is through the speaker wires, not RCA input. The...


Are you using the factory speaker wires or did you run brand new ones ?
That could make a big difference

this may sound dumb but....

is there an input switch on the amp?
And is the polarity correct on the input wires?

Jun 02, 2011 | Clarion Car Audio & Video

1 Answer

Noise/No Bass in Delco Systems stereo


You have a possible fault in your wiring of the speakers, the Phases of the speakers are crossed over resulting in cancelling of the low frequency- bass frequency. Hence please reconnect the speakers front and rear with the positive/ negative to the corresponding positive and negative of the speakers.If you are unable to fix the marking of the polarity use 1.5 Volt cell to connect to the speakers , if the speaker moves up the terminal on the positve of battery is positive. reconnect and test with a good bass song for result. Helpful. Good day

Jul 05, 2010 | Car Audio & Video

1 Answer

My speaker stop workin and the amp is fine and everything is hooked up right


Looks like the speaker is blown , or the wiring inside the speaker is broken. To test if the speaker is working, simply hook up the terminals to the ends of a AA, AAA or C battery. Speaker should make a noise, and the cone should push outwards ( or pull inwards, if the polarity of the battery is reversed). Also test the wires that are hooked to the amplifier with a speaker that you know is good working order, just to make sure that there is nothing wrong on the wiring, on that particular channel in the amp.

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My blaupunkt rear right speaker just stopped giving out any sound ..it started with a tearing sound at high volumes with bass intensive songs. then next day no sound at all. left speaker works fine. Help...


As shown in the picture double check the vibration flexible wire connecting to the center, you cannot see it on your naked eyes, use tester to prove the connection, use soldering iron to reattached the broken circuit, be responsible for the connection, put in mind that it is vibrating too heavy...














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Oct 21, 2009 | Blaupunkt GTx 693 Coaxial Car Speaker

1 Answer

The speakers only work on the surround plugs - either the fronts or the rears - not surround?


Chances are you speaker wires may be disconnected or shorted. Use your receiver TEST button, if it has one, to detect this problem, and others, like wrong polarity, or unmatched impedance, etc.
The test function emits a white noise from your speakers, going round them all, one by one, and it stops only upon pressing the remote TEST button again.
Should there be a problem, if your receiver is fairly new, your display should alert you to the kind of problem you may be having.
Good luck!

Aug 29, 2009 | Boston Acoustics (BA7800) Computer...

1 Answer

Replacing the Stereo in an 1995 Audi A6 Quattro....


I assume this is an aftermarket radio and you don't know the connections?

Normally, the red is + and the black -. A yellow wire usually is a feed to a power amp to turn it on when the radio goes on.

On the speaker side, you should have paired up wires like:
Yellow solid and yellow w/black stripe
Brown solid and brown with black stripe
Green soild and green with black stripe... you get the idea. The solid color wire is the positive and the balck striped match is the negative.
There should be 8 speaker wires altogether to give you L/R fron and L/R rear.

If you don't know which terminal is positive and negative on your speakers, try this;
Take a 1-1/2 volt AA battery and connect it to a speaker momentarily ( I do mean momentarily or you'll blow it). If the speaker cone moves out away from the magnet then the terminals match the polarity of the battery - and +.
If the cone moves towards the magnet the polarity is reversed. It is important you connect the speaker phasing (polarity) correctly other wise you will get poor bass output.
Whatever you do, do not ground any speaker wires!!!!

Aug 22, 2009 | 1995 Audi A6

1 Answer

Installing 4 after market speakers in my Ford F-350. POS/NEG post


this is actually a quotation from a site on the net as i've wondered about it to

"Speaker wire has a mark or strip on one of the conductors this is to indicate polarity of the wire. When installing speakers to the output of an amplifier you need to observe the proper polarity. This is particularly important when installing a surround sound system with front and rear speakers. If the polarity is not followed then the results will be poor balance of sound and even cancellation of some frequencies."


Robert

Jan 21, 2009 | 1994 Ford Mustang

2 Answers

POLAR WATCH- F11


try a new battery

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