wlffinch

Thanks, obob. This solved the problem and it was easy to implement given the detail in your link. :) I couldn't find that thread as a newbie here. Maybe this post will clarify things for others as the sound I was having was so annoying as to make a good car bad. Thanks again.

The ANC on my 2013 C-Max hybrid has recently gone nuts. It is putting out noise (loud low end drone) when no engine noise exists. I confirmed this by pulling the fuse. Drone goes away. Unfortunately, so does the stereo. (This is a non Sony 6 speaker stereo). My Ford dealer says they have never heard of such a thing. The car is out of warranty and I don't want to spend several hundred dollars in labor while the technicians play with everything. Disabling the mics in the headliner as other threads suggest seems like a mess as short of dropping the whole thing (no clue here) there's no access. I would happily do without the ANC if I could power up the amp from another source. Can anyone suggest how this might be done? I have seen nothing that tells me where the thing is in the first place. Any other suggestions?