I use a pressure washer and try to avoid a direct blast to the alternator. All other electrical connections are sealed. The big thing is to not spray the inside of your car, hang a plastic sheet to prevent the dust and dirt from getting all over things.
I spray all my engines down and never have had a problem, I'm sure someone will say, "Never spray your engine". Trust me, you'll be fine. One thing though, after your done use a spot free rinse so it doesn't look like crap when it dries.
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Sadly on the outside looking in.
"Drive it like the Doctor ordered"
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