A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
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Replace the Brake Light Switch (F)/Brake Pedal Switch (F47).
If the specified value was obtained:
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Using a Multimeter, check the Brake Pedal Switch (F47) terminals 1 to 4 for resistance.
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Press the brake pedal switch plunger in.
Specified value: approx. 0 ohms
If the specified value was obtained:
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Check the voltage supply of the Brake Light Switch (F)/Brake Pedal Switch (F47).
If the specified value was not obtained:
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Replace the Brake Light Switch (F)/Brake Pedal Switch (F47).
Checking voltage supply
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Switch the ignition on.
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Using a Multimeter, check the Brake Pedal Switch (F47) electrical harness connector terminal 1 to Ground (GND).
Specified value: battery voltage.
If the specified value was not obtained: