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The oil pressure switch is UNDER the alternator bracket, and you pretty much have to remove the alternator to get at it. If you lie down with your head under the front bumper and look up and to the right at the front of the engine you can see it.

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โˆ™ 2005-08-04 02:27:58
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Q: Where is the oil sending unit on a 1990 Geo Prism?
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