My 1992 soverign has new battery starts in the summer but not in the winter. And sometimes has a high pitch door open sound sometimes non stop even when door is closed and drains battery.What does this mean?
I have had diagnostic check, supposedly no problems. I feel its electrical, but what? Thank you.
That tells me you have an electrial short, hard to tell unless you can give a better idea of where noise you hear is coming from
It might be the bearing in the alternator pulley, or the brushes in the alternator themselves. I would try a new alternator.
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