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If you dont have a button on the floor or you don’t pull on your turn signal lever to change headlights from bright and dim, maybe that’s how you do it.
The “IH” button is your Intelligent High-beams. IH uses a sensor, usually one that looks for headlights or taillights, to detect other vehicles. When it does, software switches off the high beams to prevent blinding other drivers. Once those vehicles pass, the sensor switches the high beams back on.