FIX***Cabin Noise/Booming / Rattle

[KRField]

Here is a write up I did for another forum. I have a 19 Bighorn Base 6 speaker audio. ANC was causing all kinds of issues. I like to hear my exhaust rumble and HEMI rev, ANC is not something I’m attached to. I will be redoing the audio (hence not wasting money on factory upgrades) and adding sound deadner where needed so I did this.

How to Disconnect ANC at amp.

So I have had a terrible time with the ANC system. After 2 trips to the dealer STAR has no clue on it after they replaced the amp. I inquired about disabling the system. STAR didn’t even know if it was possible. STAR want the vehicle to run some scans, but since it was not a drivability issue they would not pay for a loaner.



I didn’t want to fool with dropping the headliner and disconnecting the mics. So I obtained a wiring diagram for all stereo units. All the ANC mics used the same color across all units.



I have the 8.4 Base.



Locate Amp under driver seat. Move seat all the way forward and all the way up to have room to work.





Disconnect the signal out harness, on mine the large white one. Closest to the rear of vehicle on amp.



(Note take picture of wire orientation Incase you want to reconnect later)



On the underside of the connector is a long flat pin locking mechanism, pry that up on the middle insert to release pin locks.



It raises maybe an 1/8th”






All my Mic wires were the 4 sets on the left of the connector.

Looking at the harness the ANC wire colors are (Main color/ Stripe Color)

Mic 1- Brown/Orange + | Brown/Violet -

Mic 2- Brown/White + | Brown/Grey -

Mic 3- Orange/Dark Blue + | Orange Dark Green -

Mic 4- Orange/Green + | Orange Blue -



Once wires are located looking in the connector you will see a white tab at the top of each pin hole



Use a small screw driver, pick tool, or (what I used) a paper clip to slide the tab up. The wire pin will slide out.



Once all pins are out reconnect the connector to the amp, and test all systems to make sure function properly.



Your ANC will now be disconnected.



*** PERFORM AT YOUR OWN RISK***

I am not responsible for any mishaps or damage you may cause by performing this procedure.





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[YoAdrian]

Thank you for this great write up, and for the pics; I’ll be following your path this afternoon. The ANC started off a little noisy and is now even worse - it is generating medium volume low hum/drone noises that vary with rpm.
UPDATE: At the dealership getting the ANC module replaced. Glad for this thread, helped me make it through the back-order delay.

 

[YoAdrian]

@KRField did you have to reset the stereo system after removing the microphone connections? I have removed the eight microphone wires and plugged the connector back in... but no sound. I think I powered up with it disconnected once, so now I’m wondering if the truck thinks it is still unplugged. I will let the truck “sleep on it” and check in the morning.

 

[KRField]

@KRField did you have to reset the stereo system after removing the microphone connections? I have removed the eight microphone wires and plugged the connector back in... but no sound. I think I powered up with it disconnected once, so now I’m wondering if the truck thinks it is still unplugged. I will let the truck “sleep on it” and check in the morning.

No issues here. Pulled pins plugged harness back in and started the truck tested voice activation and calls. Everything works as it should with no issues

 

[YoAdrian]

No issues here. Pulled pins plugged harness back in and started the truck tested voice activation and calls. Everything works as it should with no issues

Eventually my system figured itself out... The reset overnight at first resulted in sound coming back but all four corners of the speakers getting criss crossed on the balance screen. Shut down, waited 30 minutes, came back and all worked fine. Sure wish we knew the no kidding soft reset procedure... still, your tutorial above worked great!

 

[Mason1217]

So all 4 of the mics in the headliner are for noise cancellation? I thought some were for that and others for like bluetooth phone call audio?

 

[KRField]

Eventually my system figured itself out... The reset overnight at first resulted in sound coming back but all four corners of the speakers getting criss crossed on the balance screen. Shut down, waited 30 minutes, came back and all worked fine. Sure wish we knew the no kidding soft reset procedure... still, your tutorial above worked great!

Hey no problem. I am have bugs with my 8.4. Sometimes CarPlay calls go to rear speakers, repeated drops and pick up of carplay recognition, random resets an black outs. It always seems to figure itself out. Don’t know if that’s good or bad. It’s pushing me real hard to get the lifetime service contract.

 

[KRField]

So all 4 of the mics in the headliner are for noise cancellation? I thought some were for that and others for like bluetooth phone call audio?

The 4 that look the same front and rear are for ANC. The two others in front are for voice recognition and calls.

 

[Cmiller18y]

Just did this and it worked! Thanks! I changrd my speakers and the speakers were making a drone until i cut the anc wires.

 

[wildh24]

Just did this and it worked! Thanks! I changrd my speakers and the speakers were making a drone until i cut the anc wires.

Low frequency at about 1800 rpms?

 

[Cmiller18y]

Low frequency at about 1800 rpms?

Yeah all the way up to about 3600

 

[wildh24]

I have it too, but it's only so often. I think these things have it from the factory to be honest because there are a lot of reports even without replacement speakers. When I swapped mine I noticed it, but possibly only because the bass response of the aftermarket speakers was quite a bit better.

Hope Ram gets this fixed.

Did you notice any cabin quietness difference after disconnecting?

 

[Jtbarrett88]

Pretty sure I have this same freakin issue. really disappointed with Ram at this point . Drone between 1500-1800 rpm

 

[KRField]

I have it too, but it's only so often. I think these things have it from the factory to be honest because there are a lot of reports even without replacement speakers. When I swapped mine I noticed it, but possibly only because the bass response of the aftermarket speakers was quite a bit better.

Hope Ram gets this fixed.

Did you notice any cabin quietness difference after disconnecting?

Not really, of course I disconnected early on. I have other noises concerning the truck now that over rides road noise.


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[wildh24]

Unhooked mine today. Very helpful. Thanks. I just did the 4 +s though.

 

[KRField]

Unhooked mine today. Very helpful. Thanks. I just did the 4 +s though.

Looking back I probably should have done the same.


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[YoAdrian]

Update on my ANC noise problem: the service bulletins were done including the ANC module replacement but the noise persisted. Ram opened a STAR case a month ago and today I’m going in to have the service department check the software again and supposedly order an updated ANC. We’ll see how it goes.

In the meantime I continue to run with ANC deactivated, and my driving experience is a-ok that way.

 

[wildh24]

Thanks. Keep us posted.

 

[EJanx07]

Looking back I probably should have done the same.


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I really want to do this... sorry for extra questions, I’m not really educated in this stuff.. what exactly are the “4 +s”? I had a car audio tech, install an amp and subwoofer.
I didn’t have any ANC issues before this.
But now, it’s ridiculous on the amount of motor/exhaust noise that now comes/picks up only out of the sub now, During low rpm’s etc. I know it’s the ANC causing this. The installer says he’s stumped, and doesn’t know why it’s doing that... he said he’s gonna do some research and give me a call next week.
I’m just trying to get clarification on exactly what I need to do, to deactivate only the ANC portion, so I don’t screw something up and not be able to use Bluetooth/calling etc... and cause all sorts of issues.
Thanks!

 

[YoAdrian]

I really want to do this... sorry for extra questions, I’m not really educated in this stuff.. what exactly are the “4 +s”? I had a car audio tech, install an amp and subwoofer.
I didn’t have any ANC issues before this.
But now, it’s ridiculous on the amount of motor/exhaust noise that now comes/picks up only out of the sub now, During low rpm’s etc. I know it’s the ANC causing this. The installer says he’s stumped, and doesn’t know why it’s doing that... he said he’s gonna do some research and give me a call next week.
I’m just trying to get clarification on exactly what I need to do, to deactivate only the ANC portion, so I don’t screw something up and not be able to use Bluetooth/calling etc... and cause all sorts of issues.
Thanks!

Your answer is in the original post of this thread with pics, where OP discusses the + and - wires for each of the four microphones. Look for this:

Looking at the harness the ANC wire colors are (Main color/ Stripe Color)
Mic 1- Brown/Orange + | Brown/Violet -
Mic 2- Brown/White + | Brown/Grey -
Mic 3- Orange/Dark Blue + | Orange Dark Green -
Mic 4- Orange/Green + | Orange Blue -

Good luck.