Well, I got to it earlier today within an hour of work and somehow go it done. I went ahead and pulled apart an xbox live headset and used that as the beginning of the connection. The next step was running it behind the headunit and stripping the wires. I ran the microphone wires up through the dash, then the a-pillar, and eventually up into the headliner until it reached the factory microphone. From here, I disconnected the microphone harness and did a little custom wiring / soldering. I ran the earphone wire to the high / low converter that came with my cheap profile amplifier and then connected that to the AUX input RCA's in the back of the cd player. When I plug the earpiece jack into the phone, I can hear the person I am talking to in the front speakers while I listen to music in the rear. Vis-Versa if I choose to. It came out great and now the only thing I need to do is figure out a way to amplify the microphone so people on the other end can hear me a little better. Maybe I will play with the phone's setting and see what I can come up with. This was a sweet mod that cost me $3 for the solder. Found some at home afterward....go figure.

Heres the pics from the install. When all panels are put back on and the headphone wire is run neatly, I will post some more pics and a video so you guys can check it out.

http://s33.photobucket.com/albums/d96/Audiobreeze/

The first 8 pics are from the install.

 

link doesnt work for me

 

Linky no workey.

 

 

holy crap i almost wrote the same thing at the same time, but then i changed my mind...freaky

Even though i cant see the mod, it sounds pretty sweet. Good job.

 

link fixed. Should work now. Sorry for the delay.

 

Wow, I'm actually shocked that no one wants to do this to their car. Oh well...

 

Does anyone know how to amplify the microphone so that people on the other line can hear me when I talk into the microphone. They say I am speaking too low.

 

No but this is a damn interesting idea! GJ

 

Yes I do. Plug your stock onstar mic back in. Its actually excellent and works just fine. As you can now obviously tell, the one you are using doesn't.

So you are now able to listen to music at the same time as somebody is trying to talk? Well thats screwing up the onstar as well. The system uses an ambient noise filter that prevents the person you are talking to from hearing feedback from their voice being played over the speakers. With their voice AND music playing in the background, that's not helping them hear you either.

I agree that OnStar should have a headset jack just like the common cell phone. But what you have done has only degraded its operation.

 

WHAT! Here's the current setup:

1. Using factory onstar microphone as microphone
2. Using AUX input at rear for speakers.
3. Went to AUX mode on the headunit which has no music playing in the background and it is just as low for the person on the other line.

I don't know if it because the wire is too long and I need an in-line amplifier which I can find nowhere, or if the wire gauge is too thick. I also tried another small condenser microphone which I connected with only about 3" of wire and it is still too low. I cannot determine the exact problem here.

 

Okay, maybe I'm not understanding you. You said in your first post that you are using a headset that you wired in the factory onstar mic. Are you saying the factory mic is still connected as well as your headset mic at the same time? If so, there is your problem. You are messing up the impedance by having two mics wired in parallel with each other.

And I'm totally lost on the speaker thing. Are you listening to your phone on the headset, the cars front speakers only, I'm lost. Your first post made it sound like the front speakers play the phone while the rears are still playing music.

 

Take a look at the pics I posted in the first post. I have a handsfree headset that I cut off the headset portion. I am left with the small mm connector plug which plugs into the top of the cell phone. From there, the wires were all stripped on the other end and run as so:

The wires for the speaker (headset portion) was run to a single RCA plug. I plugged that into a Y-adapter. The two male plugs coming off the Y-adapter are plugged into the Front AUX ports in the back of the headunit.

As for the microphone portion: I ran a new set of wires from the ONSTAR microphone down through the pillar and into the dashboard. I then connected the two wires to the two wires coming out of the headset jack. I tried the wires both ways to see if that was the problem, but they can only hear me when I have it set up one of the two ways. They say I am very low and hard to hear. The connector that the onstar mic plugs into was removed and set aside in the headliner. Any ideas?

Please also disregard the music playing on the rear speakers. That is no longer the case. The mic volume is still too low even with the silence in the car.

 

I wonder if this is what I need. I may go ahead and attempt to build it tonight if I have all of the components.

http://web.archive.org/web/200502071...ts/micamp.html

 

bump for help