Got a new accompaniment to music on the car radio - a sort of whine which varies with engine speed. Coincided with a hose blowing and spraying some coolant on the alternator. Slip rings contaminated? It's fairly new so shouldn't be worn out.
Someone in the boot.
take the belt off and see if the noise is still there
Wet bearing in the alternator?
That sounds like the radio interference you used to get from the dynamo when not sufficiently radio suppressed. It sounds as if whatever served as radio suppression in your alternator has been damaged/bypassed. I'm afraid I don't have the faintest idea how to correct it in modern vehicles, though (you used to be able to buy radio suppressors for dynamos).
Check the cigarette lighter plug for one of these -
Yes - it's that sort of sound. The suppression is built in these days rather than being external. I just wondered if the slip rings could be dirty causing a poor contact and therefore the interference. Can't see the suppression being damaged by water as regulators are usually potted in something waterproof. Of course it could just be coincidence.
That is fantastic!
Just a high-tec version of putting playing cards in spokes of your pushbike.
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