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Home >> BMW >> 1999 >> 323is Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Performance DME 7.2 - Overview >> DME 7.2 >> New Or Modified Input Signals/Components >> Brake Light Switch
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Brake Light Switch

The Electronic Brake Switch (Hall effect) provides brake pedal position status to the ME 7.2. The control module monitors both the brake light and a separate brake light test switch circuits for plausibility.

When the brake pedal is pressed the brake light segment of the switch provides a ground signal. Simultaneously, the brake light test switch (located in the same housing) provides a high signal.