Aftermarket Headunit, Radio Playing from Nav Speaker

[peanutmnm]

Hi All,

I've just replaced the Concert HU in my '98 PFL D2 S8 with an aftermarket item.

After a bit of faffing with various wiring harness adaptors and ground loop isolators I've got all the speakers working without the horrible popping noises it was making. I believe the car is fitted with the half-amplified Bose system.

The car also has the basic navigation system which gives directions via the DIS and a speaker mounted on the drivers' B-pillar.

The problem I'm having is that since putting the new unit in, in addition to the sound coming out of the main speakers, it is also coming out of the Nav speaker.

This seems to be much louder than the output of the other door speakers so is throwing the balance off and, as I don't imagine it was intended for full range audio, sounds terrible.

Do you have any ideas on how I can prevent the audio being routed through this speaker?

Thanks,