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Battery drain on key fob

Battery drains after 1 week

Posted by Anonymous on


6 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

  • 71 Answers

SOURCE: battery drain

650 milliamp is too much. The Beetles had problems with the microswitches in the door latches that tell the convienience module if the doors are opened or closed. If it doesn't see the right signal the computer wont go into sleep mode an it will stay powered up draining the battery. VW techs can check the output of these switches to see if they are working right with their scan tools.

Posted on Dec 11, 2008

  • 653 Answers

SOURCE: electrical problem, battery drain.

Try to isolate the problem. If the current flow is between the fuse block and the window switch you may be grounding somewhere between. Next check the window switch. If there is current flow across the switch when not being used, replace the switch. There should be no current at the window motor until the switch is engaged. On the other hand, you could just buy one of those solar powered battery chargers for about $40 to keep the battery up and not worry about it until something fails.

Posted on Feb 23, 2009

  • 1619 Answers

SOURCE: battery on mercedes A140 drains. I drove the car

aftermarket stereo? dome lights? car alarm? Use a multimeter and see what fuse has power draw when car is off.

Posted on Jun 15, 2009

SOURCE: parasitic key off battery drain, how to fix

Keep the ammeter in series with the battery with everything off. take out each fuse in turn and note any change to the the residual current drain. The fuse that when pulled out results in a drop in the current drain will identify the guilty circuit. Interior glove box and trunk lights are classics for staying on when they should be off, often the contact brackets get bent and so not longer push the switch as far as they should to break connection. Good hunting

Posted on May 26, 2010

  • 3018 Answers

SOURCE: Key fobs will not function.

  • The first thing is to make sure the battery was a good one. Cheap batteries will not do for an FOB.
  • Make sure there is no corrosion on the terminals that connect to the battery inside the FOB.
  • I am surprised that the FOB worked after replacing the batteries. The S Type usually need a reprogramming. You may need the dealer for this but I do know how to program a FOB for an S Series Jaguar.
  1. Turn the ignition on and off ( don't start the car, just put the ignition clear forward and back) 8 times with in a 10 second time frame. This will put the security system into programming mode.
  2. Now push any button on the FOB transmitter you want the system to recognize.
  3. Now switch off the ignition.
  4. Repeat for each FOB transmitter you want to program.
  • Should the reprogramming not work the you may need have the FOB(s) replaced or repaired from the dealership. Jaguar S Type Jaguar FOBS have had their issues with static electricity knocking the programming out and at times ruining them.

Regards, Tony

Posted on May 16, 2011

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Why does my trunk open on its own and drain battery even when I only use a key and have no remote fob?

Hi Mac...Not sure what year or kind of car but...When your trunk opens, the trunk light comes on which will drain battery down. You can remove the bulb for quick fix...for the drain problem. You can do a battery drain test after you pull the bulb out...just to make sure it is not something else draining Batt down. Remember...your car comp has a small drain to operate clock, radio memory, and computer memory...So when doing Batt drain test you need to know factory allowed Amp drain.
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Door locks

well your key fob finnaly met its end of days

this is the link for new key fobs and they have tech on hand to walk you threw coding the key fob
they sale to every one but mostly dealers and this has the better prices when you order then dealer does
all you need to do is call them give them the model numbers of old key fob and your vehicle specs and you can order new fob here

now with the battery drain hole its in the middle under the battery unfortunatley but easy fix find where all the water is congregating at say to one side get a drill and bit and drill small weep hole where the water is sitting at this will relieve the water

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