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Audi a4 hazard lights keep flashing

Believe battery to be dead. Possibly due to a faulty front passenger door. The red light won't go out and it warned me the door was open last night. Checked several times and door was secure but electric connector obviously not working properly. Left it overnight and now won't start. Now sat outside with hazards flashing dimly. Have checked all doors etc locked and if I turn on hazards, they just flash faster! Any ideas?

Posted by Anonymous on


6 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

  • 39 Answers

SOURCE: Truck won't start, new battery, lights keep flashing

Sometimes the new battery is not 100% charged. Put it on a charger or jump start the car, the alternator should then charge up the battery.

Posted on Oct 09, 2008


SOURCE: won't start after cleaning battery terminals

Sounds like you have an aftermarket alarm with starter disable. By disconnecting the battery the alarm reset and the defualt setting is usually to set the alarm automatically (active arming). You have three options..
A. If you have the key fob that went with the alarm you can disarm the alarm.
B. If no key fob is available you can disconnect the battery again, turn the ignition key to the on position and reconnect the battery. This usually doesn't allow the alarm to set and allows the car to start.
C. Remove the aftermarket alarm system. This is usually the long term fix i recommend if the fob isn't available. Option B should get you going though.

Posted on May 09, 2009

  • 268 Answers

SOURCE: electric fault

You might try removing the battery connectors for five minutes and replacing back.

If the codes do not disappear, please you might have to get a scanner to do that.


Posted on Dec 15, 2009

  • 5370 Answers

SOURCE: 2005 Volkswagen Transporter T5, hazard

The fault in question is caused by a faulty door locking unit. The micro switches in the lock fail and short out. To test open each door in turn slam shut and lock door until you don't see the flashing interior light.
When you have found the fault or think you have found the faulty lock carefully tap the door handle if the switch is faulty the light etc will then start flashing.
If the micro switch is faulty sometimes the vag com will not detect a fault with the door locking unit. The most common unit for failure is the off side left rear door.

The micro switches will trigger the alarm if there is a fault that why the hazards flash.
---------- Also in your question comment, its mentioned that " If the left rear door is opened the hazards stop flashing ".------ Most probably the door lock unit for left rear is faulty or the faulty hazard light switch is the cause of problem.---------- Getting this possibility checked will help.Thanks.Helpmech.

Posted on Jul 29, 2011

  • 123 Answers

SOURCE: All of dash warning lights

Maybe one of the key fob's has gone nuts.. remove the battery from them both and see if that stops it.

Posted on Sep 08, 2011

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