Need some help here with the buzzing noise. Background:
98 ML with 60k, started last week, the stereo will begin buzzing whenever the truck go over bumps. The buzzing can be cleared if I turned off the radio momentarily and turned it back on. This phenomenon happens again when I hit another bump. Interestingly, while the stereo is buzzing, if I shut down the engine (with the radio on, and turn key to position 1), the buzzing disappears. This suggests there may be a loose ground perhaps related to the alternator. I am not too sure but would appreciate some pointers as to what to look for. Thanks.
steve