Navigation voice mutes my radio...is this possible?
This is for the electornics gurus out there. I don't know much about how this stuff so please correct me if I'm wrong with my assumptions, thanks.
I have a Pioneer AVIC-88DVD (Pioneer Navigation Unit), a Pioneer AVX-P8DVD (Pioneer in-dash monitor) and a Pioneer Head Unit.
Navi connects to the monitor, but the navigation voice is outputted to a seperate speaker connected with a 3.5mm headphone jack. I have a small navigation speaker, but I would like to mute car audio when the navi voice comes on. My head unit has a Cell Phone Mute wire which requires a ground to activate the mute. Can I use somehow connect a relay between the cell phone mute wire and the seperate navigation speaker that would activate the cell phone mute on my head unit when the navi voice comes on?
My hair-brained idea:
The big assumption here is that the current carried by the navi voice speaker is enough to activate a relay. The relay would sense the current being generated by the navi voice from the speaker wire, and if connected like this would send a ground signal to the cell phone mute wire of my head unit.
Someone help me here...thanks people!