depends if it is standard transmission it is located on the left side of the transaxle.
Standard or automatic transmission, they both are mounted to the transmission.
Fuse, bulb, or the switch mounted on outside of tranny casing.
Not sure on how to replace it, but it is located INSIDE your center console (which will need to be removed if you cant get to it by removing the shift boot) it is a pressure switch at the base of the handle...
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switch is on side of transmission under the car
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that is usually mounted on the transmission case