audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Component Locations, Overview|Page 5495 > < Component Locations, Overview|Page 5493
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Connect multimeter between terminals 1 and 4 to measure resistance.
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Specified value: infinity Ohms (no continuity).

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Press brake pedal.
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Specified value: approx. 0 Ohms

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Connect multimeter between terminals 2 and 3 to measure resistance.

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Specified value: approx. 0 Ohms

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Press brake pedal.
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Specified value: infinity Ohms (no continuity).

If the specified values are not obtained:

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Replace brake light/brake pedal switch.

If specifications are obtained:

Checking power supply

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Connect voltage tester VAG1527 B as follows:

Connector

Measure to

terminal

1

Car body Ground point

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The LED should illuminate.

Connector

Measure to

terminal

3

Car body Ground point

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Switch ignition on.
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LED should illuminate.

If the LED does not illuminate:

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Check wiring for open circuit and service if necessary.

If the LED illuminates:

Component Locations, Overview|Page 5495 > < Component Locations, Overview|Page 5493