Question about 1999 Volkswagen New Jetta

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Battery drain 200 jetta diesel

My 2000 Jetta diesel likes to eat batteries. Everything appears to be working OK and it runs fine. With everything turned off I show about 1 amp drain on the battery. Something has to run the factory alarm and whatever is waiting for the keyless locks to be activiated, but does anyone know what is the nominal drain on one of these? One amp does not sound that bad to me, But a comparison to a known good would be helpful.

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  • bherde Jan 06, 2009

    Car went down to the shop for timing belt replacement yesterday. (69,000 miles) I'll give the alternator a check when it gets back. Could be possible as my daughter reports sometimes it is OK overnight, and sometimes it will not start (no lights either) after parking for less than 30 minutes.

    Still like the car enough that I bought a 98 this weekend for $3500. Just needs a glovebox latch. Something for the boy to get to school in.


  • bherde Mar 27, 2009

    Thanks for your post. Unfortunately the car was sold just 2 days ago.

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Hi if you are getting a 1 amp drain with everything switched off thats too much the maximum drain should be no more than 50 miliamps try pulling fuses one at a time to check which circuit is affected  if no joy disconnect alternator cables or plug (not with engine running!) tell me if this helps

Posted on Mar 27, 2009

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Hi!
Although you are looking at the alarm for the fault? could it possibly be the alternator?
Have or do you charge the batteries on the vehicle without disconnecting the Negative- lead.
Sometime the alternator in built regulator becomes damaged it allows full charging capabilities but when engine turned off lets the power through the alternator slowly discharging it.
To test this try taking the charge wire/s off but make sure the battery is disconnected, isolate/insulate the cable if exposed re connect the battery and see if the drain is still occurring?
Good Luck!
Paul 'W'

Posted on Jan 05, 2009

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