Hello everyone! I'm in the process of installing a new head unit in my truck and this forum has been a lot of help. One thing I couldn't find is how to connect the new system to the built-in hands-free mic. I like it because it's a cleaner look than an add-on plus it's in the ideal location and has some buil-in noice rejection. Comercially available adapters like the Connects2 interface do not include microphone connections, either, so if you're aiming to do the same here's a tutorial!
First of all, there's three wires for the microphone in the biggest of the white stereo connectors, the 32 pin connector that also has the camera and steering wheel connections. In my Latin American spec truck those are:
Purple: +5V for powering the microphone
Light green (looks turquoise to me): Microphone signal
Black: Ground
Here's the diagram available to us. The positions don't match exsctly but the colors are actually correct.
Here's a picture showing those three wires.
You will need a 5V power source and a 3.5mm mono plug. You can tap into those wires like you would do speaker wires with a T-tap or a skotchlok-type tap, or add extra pins to your wire harness like I did.
For power I used one of the USB ports on the bsck of my aftermarket head unit. The following poorly-drawn schematic shows the connections. Basically the red +5V wire from the USB cable went to the purple wire on the harness, the white signal wire from the 3.5mm plug went to the light green (turquoise?) cable and the black wire from both the USB and 3.5mm went to the black cable in the harness.
First of all, there's three wires for the microphone in the biggest of the white stereo connectors, the 32 pin connector that also has the camera and steering wheel connections. In my Latin American spec truck those are:
Purple: +5V for powering the microphone
Light green (looks turquoise to me): Microphone signal
Black: Ground
Here's the diagram available to us. The positions don't match exsctly but the colors are actually correct.
Here's a picture showing those three wires.
You will need a 5V power source and a 3.5mm mono plug. You can tap into those wires like you would do speaker wires with a T-tap or a skotchlok-type tap, or add extra pins to your wire harness like I did.
For power I used one of the USB ports on the bsck of my aftermarket head unit. The following poorly-drawn schematic shows the connections. Basically the red +5V wire from the USB cable went to the purple wire on the harness, the white signal wire from the 3.5mm plug went to the light green (turquoise?) cable and the black wire from both the USB and 3.5mm went to the black cable in the harness.