I have a 1999 honda accord dx and just experienced a loud high pitched sound from the engine. This was followed by the battery indicator lights and door and trunk indicator lights coming on. I parked and shut off the car for a few minutes and when I started it up again it was fine ... concerned as this has never happened in the 5 plus years of owning the car. The battery is new this spring.
Check the alternator drive belt,it may be loose and squealing.
the alternator itself could be also making a noise.
start the car with the hood open and listen to it.
look if the belt is cracked,loose or wet from oil or water etc.
things like thermostat housings leaking coolant can cause something like that.
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Sounds like the belt driving the alternator is loose. Have you checked this for proper tension? Charlie
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