Audio fades in and out?
I have a 2006 GT with the Shaker 500 audio system. For the last week or so the audio fades in and out intermittently.
This seems to only happen when the car is in gear, it does not have to be moving. It does not follow any particular pattern that I can pick up and is just half a second or so (seems to always be the same length of time for the fade). The lights do not dim on the display while this is happening.
Anyone have any ideas on where to start checking? The wiring diagram does not show any obvious connection between in gear and the audio but I am not great at reading wiring diagrams. There is also a 'drain' (ping 3 on c290a), could that have anything to do with it?
Any help would be appreciated.