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      08-28-2021, 04:46 PM   #1
archerz
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Rear Door (both) speakers no sound

So i have a HK setup on my F31 2016. Noticed recently that my rear door speakers aren't transmitting audio, only the front section is (and 1 rear roof speaker).

Any ideas how i can start to diagnose what the issue is?
(i've replaced a speaker in one of the doors and it's still silent).

TIA
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      08-30-2021, 11:45 AM   #2
JohnW1965
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You will need to check the connections behind the Speaker, a continuity set and check out the continuity of the wiring from the amp to the speaker. Other than that it’s going to mean lifting the carpets and checking any connections, may be just the cards have been olpopped off and the cables disconnected in the back
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      10-10-2021, 03:47 PM   #3
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Quote:
Originally Posted by archerz View Post
So i have a HK setup on my F31 2016. Noticed recently that my rear door speakers aren't transmitting audio, only the front section is (and 1 rear roof speaker).

Any ideas how i can start to diagnose what the issue is?
(i've replaced a speaker in one of the doors and it's still silent).

TIA
Sounds simple but have you adjusted your audio balance to just front only? Change it to just rear and see if it works then
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      10-12-2021, 04:21 PM   #4
archerz
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Quote:
Originally Posted by Will335d View Post
Sounds simple but have you adjusted your audio balance to just front only? Change it to just rear and see if it works then
yes. setting to rear gives complete silence.
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      10-12-2021, 04:38 PM   #5
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In that case either there's no signal going into the amp rear channels, no signal coming out of the amp rear channels, or no signal reaching the rear speakers. I wish I could say there's an easy way to diagnose it, but there isn't.
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      10-15-2021, 05:51 PM   #6
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Quote:
Originally Posted by Billfitz View Post
In that case either there's no signal going into the amp rear channels, no signal coming out of the amp rear channels, or no signal reaching the rear speakers. I wish I could say there's an easy way to diagnose it, but there isn't.
Guess i need to find an amp to test and someone to program it ;|
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      10-18-2021, 09:38 AM   #7
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Are you sure the rear speakers haven't blown? I had the same happen my base audio system. Take out one of the rear speakers and using a multimeter compare the resistance reading between it and one of the front speakers. If the reading is inconsistent, or too low compared to the working speaker, then the speaker's blown.
You could also swap front and rear speakers around, and see if the problem persists, if it does, then it could either be a wiring issue, or the amp acting up.
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      10-18-2021, 03:23 PM   #8
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Take the card off and set multimeter to ac and see if you have voltage at the speaker.

Or unplug speaker and do the old 9v /12v battery pop test on speaker.
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      10-18-2021, 03:37 PM   #9
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12v into 4 ohms is 36 watts, and since it's DC it could toast the voice coil. Even 9v could be a problem. A 1.5v battery is sufficient for click testing or checking for cone excursion.
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      10-18-2021, 03:47 PM   #10
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Done it for 3 decades now off 9v amd 2 decades off my 12v drill battery… no issues.

But yes, click it, don’t plug it in like a damn lightbulb and wait for it to roast itself.
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