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Thread: Parrot Car Kit Mute Wire

  1. #1
    Variable Bitrate TeamRSX's Avatar
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    Parrot Car Kit Mute Wire

    Hello,

    I am in the process of finally getting bluetooth integrated into my carputer, but have a few questions.

    I was initially going to use the mobilephone plugin, which works great with RR, but i have tried a few mics and get terrible echo. It would be nice to get bluetooth integrated into the carpc, but not worth for the echo problems.

    I am considering getting a Parrot car kit which connects to factory speakers and have heard good things about them. I have done research and know how to install the unit, the only problem is i am not sure how to wire the mute wire which is usually done with the head unit which when you receive a call will mute your audio.

    Since i have a carputer i dont have a mute in and my speakers are connected directly to my amp. I am not tapping into the harness for the speakers as the speaker connection behind my dash goes to my stock bose amp, which i have taken out. The only other way to connect the mute wire as i see is with a relay and connect my relay to my remote wire for my amplifier, so when i receive a call it turns off my amp. Just not sure on the details of which wires to attach to the relay or if that will even work.

    I could just get a soho card, but because i am in canada the shipping is very expensive, and would be cheaper to get a parrot unit.

    Any help would be appreciated. Sorry for the long post, but wanted to get as much info as possible.

    Also, has anyone have any experience with the parrot units? Any good?

  2. #2
    Maximum Bitrate
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    If the mute wire is a negative output,
    Relay connections:
    Pin 85 - negative output from Mute wire
    Pin 86 - +12v (you could use constant, accessory or remote wire)
    Pin 87A- cut remote wire from your source
    Pin 87 - not used
    Pin 30 - cut Remote wire to amps

    If the mute wire is a positive output, then pin 86 should be connected to negative ground.
    "In the beginners mind there are many possibilities, but in the experts mind there are few."- Shunryu Suzuki
    "Do it right or don't do it at all"

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  3. #3
    Variable Bitrate TeamRSX's Avatar
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    Quote Originally Posted by pancit175 View Post
    If the mute wire is a negative output,
    Relay connections:
    Pin 85 - negative output from Mute wire
    Pin 86 - +12v (you could use constant, accessory or remote wire)
    Pin 87A- cut remote wire from your source
    Pin 87 - not used
    Pin 30 - cut Remote wire to amps

    If the mute wire is a positive output, then pin 86 should be connected to negative ground.
    Thanks,

    Ok, so just so i understand here is my current setup for remote wires:
    right now i have my amp remote wire connected to my serial port (i think its the dts line which is 12v). This way when windows loads it puts that line high and sends signal to my amp to turn on.

    So, what your telling me is the following:
    - Connect amp remote directly to Pin 30
    - Connect pin 87a to serial (so, when windows loads it sends 12v to pin 87a which connects to pin 30) while the relay is not powered
    - connect pin 85 to mute wire (negative)
    - connect pin 86 to 12v power source

    But, lets say i connect pin 86 to constant on my harness, won't this make the relay always power on? or am i missing something here. Becasue if its always powered on then my amp won't be connected. Unless the mute wire which is coming from the bluetooth unit is the trigger??

    UPDATE:

    Ok, i think i understand now. Even though pin 86 is connect to constant, pin 85(mute wire) doesn't send the ground signal until i receive a phone call, so the coil doesn't get powered until i receive a call and the mute wire sends the signal.. haha If i am wrong please let me know.

    I appreciate your help.. Thanks a bunch..

  4. #4
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    ^ Yep, so long as the mute wire is not active the circuit is incomplete and the relay will not energize.
    "In the beginners mind there are many possibilities, but in the experts mind there are few."- Shunryu Suzuki
    "Do it right or don't do it at all"

    PROGRESS:
    [-------90%-] (New Car=New Build)

  5. #5
    Variable Bitrate TeamRSX's Avatar
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    Thanks for the help. I just have one more question.

    Should i not connect my amp remote wire to pin 87a and connect the 12v source to pin 30? Right now from my reply i have pin 30 going to my amp remote and pin 87a going to 12v source (which is my serial dts line).

    From my reading isn't pin 30 constant and pin 87a accessory? So, i should have the 12v source to pin 30 and amp to pin 87a? Or does it even matter?

    Should the relay pins for 30 and 87a be the following:
    - Connect amp remote directly to Pin 87a
    - Connect pin 30 to serial (12v power source)

    Blair

  6. #6
    Constant Bitrate
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    Doing it the way you describe would be the correct way to solve this mechanically, but I'm wondering if there's a more integrated way to do this with software. I'm just guessing and I have no idea if this would work, but... What if you can connect the Parrot and the pc to the phone via bluetooth, most phones will allow multi-point connections. When a call comes in RR does it thing and mutes/pauses and the Parrot does it thing and acts like a headset for the phone.

    I just don't like the idea of the amps turning off/on suddenly like that, especially when there's a signal going to them. Usually the headunit would help with the soft-on.

  7. #7
    Maximum Bitrate
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    Quote Originally Posted by TeamRSX View Post
    Thanks for the help. I just have one more question.

    Should i not connect my amp remote wire to pin 87a and connect the 12v source to pin 30? Right now from my reply i have pin 30 going to my amp remote and pin 87a going to 12v source (which is my serial dts line).

    From my reading isn't pin 30 constant and pin 87a accessory? So, i should have the 12v source to pin 30 and amp to pin 87a? Or does it even matter?

    Should the relay pins for 30 and 87a be the following:
    - Connect amp remote directly to Pin 87a
    - Connect pin 30 to serial (12v power source)

    Blair
    It doesn't really matter which of those 2 pins goes to which side of the wire you are interrupting. It is just changing the normally closed circuit and breaking open the connection to interrupt it when energized. The same way an ordinary switch would act, except electronically triggered.
    "In the beginners mind there are many possibilities, but in the experts mind there are few."- Shunryu Suzuki
    "Do it right or don't do it at all"

    PROGRESS:
    [-------90%-] (New Car=New Build)

  8. #8
    Variable Bitrate TeamRSX's Avatar
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    I had just one more question. I just got my parrot unit this week and was planning on installing it this weekend. Now i just received a response from parrot, i just had a few questions, and this is what they told me regarding the relay:

    "All relays that are driven by electronic boxes should have a common rectifier diode (1N4xxx series or equivalent) placed across the relay coil with the stripe pointing towards the battery. Without a protection diode to absorb the reverse EMF or “kickback” when the relay coil current stops flowing, the Parrot mute circuit locks up."

    So, they are telling me to put a diode between the relay coil (pin 85 and 86) . Is this really neccessary? It makes sense what they are saying, but not sure if its needed or not. Some ppl say the mute line locks when the relay de-energizes without the diode.

    Again, thanks for your help its much appreciated..

  9. #9
    Constant Bitrate firstorbit84's Avatar
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    I've got a parrot and the head unit that I connected it to doesn't have a mute signal input... I'm pretty sure that the parrot works by intercepting the audio signal after the amp, but before the speakers... it mutes the sound coming from the audio source automatically, and drives the sound for the phone call itself... As I understood it, the mute wire connection on the parrot is optional for head units that have that feature.

    Also, make sure you put the mic as close to you as possible. I put mine in the dash and people have said they cannot hear me so well... So, I'm going to have to move it at some point. Good places are at the top of the A-pillar or on the steering column... Good luck!

  10. #10
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    Quote Originally Posted by TeamRSX View Post
    I had just one more question. I just got my parrot unit this week and was planning on installing it this weekend. Now i just received a response from parrot, i just had a few questions, and this is what they told me regarding the relay:

    "All relays that are driven by electronic boxes should have a common rectifier diode (1N4xxx series or equivalent) placed across the relay coil with the stripe pointing towards the battery. Without a protection diode to absorb the reverse EMF or “kickback” when the relay coil current stops flowing, the Parrot mute circuit locks up."

    So, they are telling me to put a diode between the relay coil (pin 85 and 86) . Is this really neccessary? It makes sense what they are saying, but not sure if its needed or not. Some ppl say the mute line locks when the relay de-energizes without the diode.

    Again, thanks for your help its much appreciated..
    Some devices, some that aren't properly engineered, might receive "feedback" from the relay because the magnetic field with the active coil has the tendency to resist change in current it has the possibility to cause a spike when it is deactivated. The diode in that configuration helps to reduce that spike by redirecting that current back to the coil/relay instead of the device.

    Even with the few dozen parrot kits I've installed without the help of the suppression diode, I personally have not had much of a problem with having to wiring a suppression diode, unless the manufacture requires it. If it was so important then they would document it within their installation manual. I haven't had a single bluetooth install come back except for microphone relocation problems.
    "In the beginners mind there are many possibilities, but in the experts mind there are few."- Shunryu Suzuki
    "Do it right or don't do it at all"

    PROGRESS:
    [-------90%-] (New Car=New Build)

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