07 LX with Nav - upgraded sound system, now Bluetooth hands free doesn’t work (1 Viewer)

[2007LX470]

Hi all, I recently went thru hell by way of installing a new amp, signal summer, and speakers. All are added at the output of the factory ML amp. Sounds great but no audio on BT hands free. Any idea where that module lives and how it works with the factory speakers? Has anyone encountered this? Super confused here. Thinking of trading my vais for a unit with a mic but if this is fixable I’d prefer to not waste my time and money

Also happy to give any diagrams you want of how I did the install!

Thanks in advance n

 

[2007LX470]

Just thinking out loud here, might be worth tapping into the wires for the factory speakers closer to the door, might solve the issue for me

 

[Pucker5]

Anyone who’s retained this function has has to do what you’re thinking. some aftermarket amps like zapco have line outs for bt. What signal summer did you use?