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Using Uconnect mic for Aftermarket Stereo

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28K views 12 replies 8 participants last post by  STDog  
#1 ·
I recently bought an aftermarket radio to upgrade my 2008 Patriot from the stock REC radio. I really didn't want to mount a microphone to my dash and break the nice clean look, so I looked into using the Uconnect mic built into the mirror instead. It seems not many people have posted about this, so I gathered what info I could and went about finding the right wires to attach to a standard 3.5 mm jack for use on the aftermarket radio.

The first thing to do is get a cable with a 3.5 mm plug on the end (Picture 1). I used a cable cut from an old set of computer speakers. Since this is a stereo connector and we only need a mono connecter for the mic, I had to check continuity on the wires to see which one goes to the tip of the connector, which will be the positive mic wire (Picture 2). The shielding and the non-tip wire will be connected together and used as the mic ground.

Next, I had to find which cables coming out of the mirror are for the mics. Since the Uconnect mic is actually a dual microphone, there are two mic wires coming out, but only one mic ground. I unplugged the cable from the back of the mirror and used the wire diagram (Picture 3) to find the wire colors. I'm not sure which one is the left mic and which one is the right mic, so I just went with the one the diagram calls Microphone 1 In(+). For me, the colors are light blue with an orange stripe for the ground (Microphone In(-)), and light blue with a green stripe for Mic 1.

When I took off the drivers side A Pillar covering, I saw that the wires were routed down there. I cut the wires close to the connector by the tweeter cover (Picture 4) and used a butt connector to attach them to the ends of my 3.5 mm cable (Picture 5). I then routed the 3.5 mm cable down the same hole the other wires go through, behind the instrument cluster, and across to the center console (No picture here, it was hard enough just to get my hands in there).

Everything is hooked up and the mic is working now, but this could probably be a bit cleaner if you know how to pull the pins out of that connector instead of snipping the wire. I tried messing with it a bit, but couldn't get anything to budge so I gave up and just cut the wire.

While the mic works, I'm also hoping someone can help me with another issue. I used the PAC RP4-CH11 to keep my steering wheel controls and factory amp, but the subwoofer isn't working now. All of the speakers are playing, but I get nothing from the sub and I can't figure out why. From what I understand, the audio signal goes to the amp and the amp deals with passing on the signal to the sub, so there should be no reason it worked before but doesn't now. I sent an email to PAC and I'll see if they have any advice, but has anyone else seen this problem when upgrading, or know what I might be able to do?

I hope this guide helps for anyone trying to use the stock Uconnect mic, and thank you for any input you may have.
 

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#5 ·
I'm trying to do EXACTLY the same thing!! Glad someone figured it out.

I have the uconnect mirror with the 2 mikes, and there're 4 wires that reference microphones. Trying to figure out which ones i need to make the mike work with my new head unit.

I have Mic 1 in (+), Mic in (-), Mic 2 in (+), the something called Microphone Feed. I tried impedance testing across all of these and saw no readings at all. Not sure if I'm doing something wrong. Same as your wiring diagram, so either I'm doing something wrong, or my mirror is borked

Also, are you using a 3.5 inch connector with 3 leads? or 2 leads?
 
#6 ·
You need to use Mic In (-) as the ground, then choose either Mic 1 In (+) or Mic 2 In (+) as the other wire. I'm not sure what Microphone Feed is, but you don't need it here. I went with Mic 1 In (+), but I'm not sure if that's the left or right one and didn't know of a good way to check. Once you verified the wire colors at the mirror connector, you can cut the wires behind the A Pillar of the same colors.

I'm not sure what you mean with your question about the 3.5 mm connector, but I'll try to explain what I used. I took a stereo connector which, when cut, has two wires plus the shielding/ground. With a normal mono microphone cable, you would only have one wire plus the shielding/ground. The tip of the 3.5 mm connector is the microphone + part, and everything above that is ground.

With a stereo connector, you can see that what would normally be a solid metal piece above the tip on a mono connector is actually split in two. That's why I tied both the shield and the non-tip wire together to act as ground so that everything above the tip is ground.

I hope this helps.
 
#7 ·
Thanks SOOO much. I tried exactly this but the mike didn't work. I might have done something wrong though (I'm an airhead most of the time). I actually tried a mono 3.5 plug and that didn't work correctly, so maybe I'll use the 2 conductor method you did.

I was actually trying to figure out how to wire in BOTH mikes so I would have a better chance of having my voice heard by whoever I am calling, but that seems to be a fools errand at the moment.
 
#9 · (Edited)
Hope this could help:
I did the same as NightAngel did (on a 2012 Grand Caravan instead of a Patriot) but it wasn't working for me. I realised that there is preamp in the mirror which needs to be powered to have either mic 1 and/or mic 2 working. Mic preamp's power and ground is provided from the Uconnect hands free module. I disconnected the Uconnect hands free module and I found out that it was the reason why it wasn't working. I didn't wanted to connect it back for some reasons so I placed a jumper between the ground wire and the Sensor ground (Microphone ref.) and I connected +12V to the Microphone feed wire (coming from my aftermarket head unit's aux. +12V output (the one used as signal for auxiliary power amps relay)). Now the microphone is working like a charm.

Also, I found that Microphone 1 is the driver's side one and Microphone 2 is the passenger's side one.
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#13 ·
Don't want to say you are wrong, but do you have a wiring diagram showing that the mic feeds to the radio in addition to the hands free module?

What year and radio option?

From the wiring diagrams it seems the microphone goes to the hands free module along with the USB port.
And the module then sends stereo audio to the radio. As I understand it that would not just be the microphone, but call audio and audio from USB and BT. The radio module (head unit) doesn't deal with the phone/BT stuff it just provided a UI for the hand free module. And the radio module handles AM/FM tuner, CD, front panel AUX port, and satellite radio and GPS.

The premium system adds a USB media port that directly connects to the radio module but doesn't change the hands free module connections. Again there is no separate microphone signal on the radio module