A4 Quattro Wagon L4-1.8L Turbo (ATW) (2000)
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Connect multimeter between terminal 1and 2 for resistance measurement.
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Specification: Infinity Ohms (no continuity)
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Depress accelerator pedal.
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Specification: approx. 0 Ohms
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Connect multimeter between terminal 3 and 4 for resistance measurement.
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Specification: approx. 0 Ohms
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Depress accelerator pedal.
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Specification: Infinity Ohms (no continuity)
If specified values are not obtained:
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Replace brake light switch / brake pedal switch.
If specified values are obtained:
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Check voltage supply
Checking voltage supply
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Connect VAG1527B voltage tester as follows:
Harness connector
Measure to
Terminal
1
Chassis Ground (GND)
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LED must light up.
Harness connector
Measure to
Terminal
3
Chassis Ground (GND)
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Switch ignition on.
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LED must light up.