2. Remove the relevant device, component or printed circuit, referring to figures 12.10, 12.11 and 12.12.
3. Many devices require the use of an Audi tester to test, but the following can be done without the use of special equipment.
4. To check the voltage stabilizer, connect the instrument wiring and reconnect the negative battery terminal.
5. Connect a voltmeter between the positive connection of the voltage regulator and ground (pic. 12.13) (photo). Turn on the ignition, the battery voltage should be approximately on the voltmeter. If not, check for damage to the wiring supplying the stabilizer.
6. Check the output voltage of the stabilizer by connecting a voltmeter between connection 3 (positive output) and 1 (Earth), as shown in fig. 12.14. With the ignition on, the voltage should be 9.75-10.25 volts. If not, replace the voltage regulator. Switch off the ignition after completing the check.
7. The accuracy of the fuel gauge can be checked as follows. Remove all fuel from the tank, then fill with exactly 12.0 liters of fuel.
8. Turn on the ignition, wait two minutes for the meter readings to stabilize. After that, the arrow should be aligned with the top edge of the red reserve zone. If necessary, turn the adjusting screw under the pointer to correct the reading.
9. Assembling the dashboard is done in reverse order.
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