In my car it was under the dash above the gas pedal. It could be in the engine bay in your car, I'm not sure. It will give you a sore back and fingers and it gets hot down there and there is no light.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual