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2005 Volkswagen Jetta

Question: What is draining my battery?

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Palmer68, Fredericksburg, VA, December 02, 2011, 05:22

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New Battery,alternator & all fuses have been checked. No one can find what is causing it :( It happens about every 3 days. I have to jump start it. Diagnostic test have been done & still can't find anything. Help!!!!!!!!!!

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• Answer #1

  WATERLOO MOTORS INC. from Waterloo Motors Inc, December 02, 2011, 07:05
  

   Enthusiast

  Parasitic draw is normal in all late generation vehicles but any draw in 05 Jetta above 40 milliamps is too much and will kill a new battery in 3 days. I have found that many techs do not know the proper procedure for testing parasitic draw. We have found issues in the VW's due to water damage in control units but this was in mostly earlier models, late 90's etc. I suggest you find a shop that can do a proper parasitic draw and that testing of circuit with draw can be repaired.
  Dan @ Waterloo Motors
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• Answer #2

  patrick mannion from Greg Solow's Engine Room, December 02, 2011, 15:47
  

   Master

  I agree with Dan. I would have an inductive amp meter on the power side of the battery, disconnect the alternator power wire in case it is drawing current, disconnect fuses one at a time to see what circuit is causing the draw. Properly test the battery as well, hydrometer and high rate discharge test. Any water leaks in car?
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