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When car is left for a few days somthing is draining the battery

New battery was fitted this febuary

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Put an amp meter in the earth wire to the battery and see what current is being drawn out with everything switched off. batteries will self discharge through faulty cells so have a load test done on the battery to check for condition.

Posted on Nov 14, 2014

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Posted on Jan 02, 2017

cadman000
  • 607 Answers

SOURCE: BATTERY IS DRAINING EVEN WHILE CAR IS NOT IN USE

I stated "such as a light " there are many, many other causes of 12 volt drains such as a seat switch that might hang up and stick. Empty that battery overnight. First install a 9V Battery Radio memory / and clock or you will have to reset both. Disconnect BLACK negative cable of battery. Using a 12V testlight, connect one end to the disconnected cable, and the other to the negative battery terinal. It should light. Remove the 20A BODY and LIGHTER fuse first . This will eliminate the courtesy light circuit . If light goes off the drain is on that circuit. STILL LIT ? drain is on another circuit. Start by eliminating fuses. Hope this helps.

Posted on Apr 13, 2009

Murphybanton
  • 2004 Answers

SOURCE: Battery Draining

Disconnect the stereo and watch the condition of the battery. Most of the time the stereo gets power out of the battery even when engine is off.

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Posted on May 26, 2009

  • 8404 Answers

SOURCE: Hi, my battery went flat

There is something on ... batteries do die naturally ... about 1 to 2% a month if left alone, but not in three days. Put a volt meter between the + cable and the + post (remove the cable). Observe the amp draw. Remove the fuses one at a time until the reading toes to zero.

If no change ... consider the alternator ... umplug it from the circuit. You could have a fault in the diode bridge.

Posted on Dec 07, 2010

airjer995
  • 5332 Answers

SOURCE: 1997 saturn replaced battery(new) dead

When the car is running check the voltage at the battery. You should see 14 volts. If you see around 12 volts or less the alternator is not charging.

Posted on Jan 17, 2011

SOURCE: i bought an audi a3

Hi Anne,
With all vehicles using electronic computer management systems, there is always very low consumption of power from the battery, as these systems are running all the time. However even with those systems running you should be able to leave the car parked for a period considerably longer that one week.

As the AA has confirmed that the charge rate is correct from the alternator, I would suspect the replacement battery. Make sure that the size (The amp hour capacity is correct for your vehicle) If it's too small the systems may drain it during the time indicated....

I doubt very much that you have a short circuits in the vehicle, but to be on the safe side take it along to a shop who have an auto electrician and let them carry out the relevant tests.

I suspect the battery.

Regards Johngee10

Posted on Jan 25, 2011

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1 Answer

After new battery put in, battery is dead in a few days.


When you shut down the car some circuit in the car is using current at an excessive rate so as to drain the battery. To repair you need to locate the source of drain. You can do this by connecting an ammeter to the car battery and while the car is turned off monitor the amperage reading. You will see a draw. Then pull fuses, one at a time, till you see the drain virtually disappear. Now you have identified the circuit that is responsible for draining your battery. If you cannot fix it, at least you know where the hassle is and you can always pull that fuse when you leave the car unattended for a few days so that the battery is not drained. If getting to the fuse is a hassle you can always replace the fuse with some wiring and a switch that you place in the glove box and all you do is turn the switch off when you remove the key. Presto - cheap fix!!!!!!

Aug 22, 2015 | Cars & Trucks

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Battery drains and bought a new one but problem still there


Sounds like u need to check for battery draw...something is keeping power coin when car is off and draining battery...
Also may wanna check alternator for charging...

Sep 25, 2014 | 1996 Lincoln Town Car

2 Answers

2006 focus battery drain


The light stays on? then that is the drain, check and see if you pull fuse that controls that light will battery still drain. i would bet that this is the problem, if it is the problem let me know in a few days and i will check a wiring diagram to try and see what controls that light. i believe the keyless entry module does but lets see if that is the problem.

try removing the dashlight fuse over night or even light few, until that light goes out and let me know.

Nov 18, 2012 | 2006 Ford Focus

1 Answer

New altenator and new battery, but if i let sit without starting for a day battery goes completely dead


There is somthing that is not turning off or a short somwhere draing you battery..till you find the problem take the hot cable off the battery so it dont drain it

Mar 13, 2012 | 1982 Ford F 150

1 Answer

I bought an audi a3 1.6 in october 2009 not knowing that the heater or the radio didn't work-i mention this just in case it is relevant to the battery drain.approx after one month the car wouldn't start...


Hi Anne,
With all vehicles using electronic computer management systems, there is always very low consumption of power from the battery, as these systems are running all the time. However even with those systems running you should be able to leave the car parked for a period considerably longer that one week.

As the AA has confirmed that the charge rate is correct from the alternator, I would suspect the replacement battery. Make sure that the size (The amp hour capacity is correct for your vehicle) If it's too small the systems may drain it during the time indicated....

I doubt very much that you have a short circuits in the vehicle, but to be on the safe side take it along to a shop who have an auto electrician and let them carry out the relevant tests.

I suspect the battery.

Regards Johngee10

Jan 25, 2011 | Audi A3 Cars & Trucks

4 Answers

2005 Jeep Grand Cherokee battery will drain


Ditto here on a 2005 jeep. We bought it new and found the battery dead on a few mornings the first year. Nothing left on. Did the new alternator thing about 2 yrs. ago and a few batteries along the way. This is what we noticed..... If you leave a CD in the CD player, that is the prime little devil that sucks out the juice. Now, we never turn off the car while a CD is in the dash. Now, maybe not necessary every time, but always overnight and now by habit, all the time, we make sure there is no CD inserted when the car is off. Hope this helps.

Nov 24, 2009 | 2005 Jeep Grand Cherokee

2 Answers

2005 Dodge Caravan with Dead Battery. Replaced and new battery died. Took it in for service. Alternator checked out ok and Drain was within tolerance. Will still die if I let it sit for more than a...


Disconnect battery from vehicle overnight to check for internal battery drain.......just take one of the cables off.
If the battery is still up and starting the vehicle after being disconnected after a day or two......the drain IS in the vehicle and will have to be checked again.
Do it yourself.
Buy a cheap 12 volt test light.
Place it between the cable you removed before.
One end on the battery post and the other on the cable end.
Now....with the key off......
If the light glows brightly....you have TOO MUCH drain.
We want a dim glowing light.
The dim light is just the memory circuits in the electronics and OK.

With the doors closed....take out one fuse at a time until the light glows dim.......the fuse that dims the light is the problem circuit.
If no fuse dims the light...remove relays one at a time.
Remember....some fuses and relays could be in the engine compartment and under the dash.
If no relay dims the light disconnect ALL alternator wires.
Remember....anything that uses power will make the light glow ....keep those doors closed (we do not want interior light drain affecting the test ) and if you have a under hood light check it first by removing the bulb.
We do not want false readings.

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Check you Key FOB for a low battery.

May 20, 2009 | 2003 GMC Sierra 2500HD

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Electric fans runs after car is shut off, drains battery


Having the fan run on for a bit after the engine has stopped is not abnormal in itself, but 20 minutes sounds excessive.

If the fan does eventually shut off, I'd consider changing the thermoswitch (this is a sensor screwed into the radiator somewhere near the bottom, with a pair of wires connected to it - to change it, you'll need to drain the cooling system).

If the fan stays on continuously until the battery is completely flat, see what happens when you unplug the wires from the thermoswitch. If this stops the fan, you need to replace the thermoswitch. If it doesn't, then you need to examine the wiring associated with the switch and the fan, looking for damaged insulation.

A.

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