Question about 1997 Audi A6

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Why does my battery keep dying in my audi 1997 a6? When it's running and the fan kicks on the voltage meter jumps down. When the lights are on and then fan kicks on my lights dim.

Battery is always dead after siting for longer then a day and it always stars hard

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  • Jeremy Martin Apr 18, 2013

    The battery is not even a year old and the alternator has been checked and it is good at the terminals

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  • 537 Answers

The battery seems to have reached end of design life. Replace. Also check charging system for voltage. With engine idling check voltage at battery terminals. It should be about 14 volts.

Posted on Apr 18, 2013

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Posted on Jan 02, 2017

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SOURCE: fan motor keeps running on Audi A4 2004

fan motor has a thermal switch which turns on the fan as soon as the engine heats up. what happened there is that the switch is stuck on the closed position which keeps the fan on all the time. you should go to a garrage and have the part changed.

Posted on Jul 22, 2008

  • 221 Answers

SOURCE: The battery on my 2003 Audi A6 keeps dying. I

Sound's like a bad alternator, you can check the alternator by measuring the voltage on the battery when the car is started, it should measure above 12.6 volt's but not higher than 14.5 volt's, check the drive belt tension, a lose or wore drive-belt could cause problem's with the alternator charging the batery, check the battery terminal's for corrosion, along with the connection's of the battery cable's.
Hope this help's, good luck.

Posted on Apr 06, 2009

  • 20 Answers

SOURCE: 98 Audi A6, Battery died overnight, when jumping smoke rises

Sounds like the alternator is badly damaged. The alternator will drain the battery if the regulutor or diode assembly goes out and/or the alternator is seized or locking up, which will cause the smoke (belt slippage) and drag on the engine (rough idle).

Posted on Apr 25, 2009

co7196
  • 3433 Answers

SOURCE: 03 Audi A4- Coolant fan runs until the battery dies

What does the fan do when you restsrt/charge the battery? Start up again? Replace the sending unit, or unplug the sending unit first. If fan keeps running, the relay is faulty.
if it stops, the sending unit is at faulat. good luck

Posted on May 31, 2009

  • 1 Answer

SOURCE: Battery Dead, can't get into trunk to jumpstart

I TRIED THIS ALTERNATOR RED WIRE FIX TODAY,ALTHOUGH I DID GET IGNITION,WHEN I TRIED TO START IT BLEW A FUSE.ANYBODY KNOW ABOUT THIS.

Posted on Mar 03, 2010

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The battery should never be disconnected while the motor is running - this can cause excessive voltages to appear on the alternator output.
That in turn could cause destruction of any electronic module on the vehicle, including damage to the alternator itself.
Assuming the electrical system has not been damaged, the cause of your discharge problem is most likely a current drain on the battery when the vehicle is unused.
Check for a drain current from the battery while the vehicle is standing with engine and all electrical system turned OFF -
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Dimming lights and voltage drop


Its not unusual to have a sudden drop of volts. especially if you have something running like your a/c or heater that requires a lot of power to run. it will also do it when your fan kicks in. anything that requires power is going to kick down your voltage. i would not worry about it unless the battery starts to die overnight.

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