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| Unplug the 4 pin plug connection from the ignition terminal. |
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| Measure the power supply between contacts 2 + 4 to the test box with hand-held multimeter and adapter cables from -V.A.G 1594 A-. |
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| Specified value: approx. battery voltage |
| If no voltage is present: |
| –
| Check the cable between 4-pin plug contact 4 and earth for interruption according to the Current Flow Diagram. |
| –
| Check the cable between 4-pin plug contact 2 and the relay plate for interruption according to the Current Flow Diagram. |
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