Question about 2007 Subaru Impreza WRX STI Limited Sedan

2 Answers

Battery Drain in 4 days

Hi

My battery drains within 4 days if the car isn't driven.

I have measured the drain across the negative terminal and negative wiring at it read 0.70.

I then took out one fuse at a time until I had a reading of 0.09.

Once I removed the fuse my central locking didn't work, the interior lights didn't work and I take it the alarm and immobiliser didn't work. The car did start...

I need help!!!

Posted by on

  • 1 more comment 
  • Howard F Oct 24, 2008

    I have the same problem on my 2007 Impreza, but not a WRX. I have yet to measure the power draw level. I've had the radio and sound system rewired, with no impact on solving this problem. Subaru checked it out and said the battery and alternator system were performing normally. I have installed a line on to the battery terminals to more easily plug in a a trickle charger as a bandaid to the problem. I suspect the security system may be the cause. I'd appreciate any other ideas. What kind of device is used to measure the power draw level?

  • andsauter Jan 05, 2009

    i am having the same problem on my 05-sti and now i even get a no connection error when im trying to use a charger

  • batsky Jan 28, 2009

    May be a bit longer than three days, had from new april 2004 just started hapening over christmas, new battery fitted still a problem. Jump starting to get away at present.

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

In my case, the problem turned out to be the after-market radio which is on the same circuit as the interior lights and clock. Once it was changed, the problem was solved.

Posted on Feb 01, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 61 Answers

The amp spec is about is about 50-75 mA which is .05 amps with everything off. When checking parasitic draw you have to give the car about 20 mins to stabilize because some of the controllers dont completely shut off for up to 20 Mins

Posted on Jan 28, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Car will start drive fine for couple days then i go out the next day wont start


Hi Jc, A fully charged battery is 12.6. The link below is a short youtube video on how to find out if a car battery has a power drain, The video starts with the guy loosening the negative lead to the battery then turns the multimeter on and sets it to 20 DC, plug bottom of lead to current mode and places 1 multimeter lead on top of the terminal inside the negative lead and the other multimeter lead on the negative lead and wiggle the negative lead off the battery, The current being drawn from your battery should be less than (5.0) 50 mille volts..... The reason he takes the negative lead off after connecting the multimeter this is to save any codes from the car as technically the battery isn't disconnected.....CHEERS..

How to Find Car Battery Drain

Apr 13, 2016 | Hyundai Motor 2004 Accent

1 Answer

My 2010 Ducato 3ltr m/home with 24K The engine battery keeps going flat, I think something is draining it, Once running the engine is ok and will restart but next day flat Can anyone offer any advise


Hi, A fully charged battery is 12.6. The link below is a short youtube video on how to find out if a car battery has a power drain, The video starts with the guy loosening the negative lead to the battery then turns the multimeter on and sets it to 20 DC, plug bottom of lead to current mode and places 1 multimeter lead on top of the terminal inside the negative lead and the other multimeter lead on the negative lead and wiggle the negative lead off the battery, The current being drawn from your battery should be less than (5.0) 50 mille volts..... The reason he takes the negative lead off after connecting the multimeter this is to save any codes from the car as technically the battery isn't disconnected.....
CHEERS..
How to Find Car Battery Drain

Apr 04, 2016 | Cars & Trucks

2 Answers

The five lighhts across the top drain battery


S10 Battery Drain - Discussion on Topix

www.topix.com > Chevrolet S-10
Apr 4, 2008 - Having problems with battery drain on my 2001 S10 4.3 V6. .... killing thebattery because the lights and everything will drain out and then ... I have a 2000 s10 4.3 have to unhook battery ever time I shut it off put in a new starter 5 months ago ...Comments made yesterday: 41,571 • Total comments across all ...

Parasitic Battery Drains - Diagnostic News

www.diagnosticnews.com/parasitic-battery-drains/
Jun 24, 2014 - Testing for parasitic battery drains has changed a lot since my dad ...Most test lights would require more than 500 mA to flowing through .... Connect the switch into series between the negative battery cable and post as shown in figure 5. ...Now, connect your ammeter with its in-line fuse across each side of ...

Battery - 9 - Care Of The Battery On The Car


Dec 16, 2015 | Cars & Trucks

3 Answers

Battery drains overnight


Car And Deep Cycle Battery

Frequently Asked Questions

submenu.jpg How do I jump/bump start my vehicle?What is the Bottom line and Tips?How are Batteries made?How do I preform Preventive Maintenance?How do I Test a Battery?Is Vehicle's charging system OK or Large Enough?How do I install new batteries?How do I dispose of my old battery?How do I charge my battery?What causes my battery to drain overnight?Common causes of premature battery failures?How can I store batteries?What are they Myths about batteries?How can I increase the life on my battery?How long can I park my vehicle?How can I revive sulfated batteries?Why won't my engine start?

What causes my battery to drain overnight? Parasitic (or ignition key off) drain is the cumulative load produced by electrical devices, for example, emissions computers, clocks, security alarms, radio presets, etc., that operate continuously after the engine is stopped and the ignition key has been switched off. Normal parasitic loads are below 75 milliamps (.075 amps). When the parasitic load is greater than 75 milliamps (.075 amps), batteries will drain more quickly. Glove box, trunk, and under hood lights that do not automatically turn off when the door is closed or shorted diodes in alternators are the most common offenders. Cooling fans, power seat belt retractors, radios and dome lights left on, alarm systems, and electric car antennas have also caused batteries to drain overnight. Leaving your headlights on will generally discharge a fully charged car battery, with 90 minutes of Reserve Capacity (36 amp hours), within a couple of hours.

It is highly recommended, especially if you are using a sealed wet "Maintenance Free" (Ca/Ca) battery, that you allow it to thaw if frozen, fully recharge it in a well ventilated area with an external battery charger, remove the surface charge, and load tested both the battery and the charging system for latent damage from the deep discharge. You could have a damaged or bad battery. If the alternator is warm and the engine is cold, then check for a shorted diode in the alternator.

Below are some methods that are used to test the parasitic load with the engine NOT running, under hood light disconnected, all accessories switched off, and the vehicle doors closed:
  • Connect a 12-volt bulb across the positive and negative battery terminals to test the bulb and the battery. If it glows brightly, then remove the negative battery cable and connect the bulb in series between the negative battery cable terminal clamp and the negative battery terminal. If the bulb continues to glow brightly, then start removing fuses or connections to the positive battery post one-at-a-time until the offending electrical component is identified by the bulb dimming.

  • A better approach is to use a DC ammeter, for example a Fluke 175, inserted in series with the negative battery cable terminal clamp and the negative battery terminal or a clamp-on DC ammeter, like a Fluke 336 or i410 around the negative battery cable. Starting with the highest scale, determine the current load. If the load is above 75 milliamps (.075 amps) after the initial surge, then start removing fuses or connections to the positive battery post one-at-a-time until the offending electrical component is identified by the parasitic load dropping to within 75 milliamps (.075 amps).

Oct 17, 2015 | Cars & Trucks

1 Answer

Drains battery while sitting


Here is how to detect a drain in system! Use a test light, Hook up test light to the negative terminal on battery. ( unhook terminal first.) connect opposite end of test light to negative on battery. If a drain, light will be on. Start pulling fuses from fuse box. when the test light goes out, that is the problem curcuit. let sit 3to5 minutes before pulling fuses. Good-Day!

Aug 07, 2014 | 1986 Ford Mustang

2 Answers

Vw beetle battery is good but something is draining it. sos help


The standard procedure is to disconnect the negative cable and use a test light or meter to measure voltage.
A test light between the battery post and ground will light up until the drain is knocked out.
You disconnect each fuse and cable until you find the drain.

Jan 18, 2013 | Cars & Trucks

1 Answer

New battry keeps running down


If your battery runs down when the car is off and not running, then you probably have a 12volt drain
killiongthe battery. If your problem occurs even when the car is being driven and used, then your alternator may be the culprit, it may not be charging enough. Attach a voltmeter across the + and - battery terminals. Start the car and let it idle without any accessories on. If you get a reading somewhere between 13.75 - 14.75 volts, your alternator is ok.
To check for a 12volt drain, disconnect the negative battery terminal and slowly scrape it on
the negative battery post 3-4 times. If you see any light to medium sparking as you do that, you probably have a 12volt drain killing the battery. BTW, don't be afraid of being shocked, no chance of that. This is extremely light voltage we're taking about here. Any 12volt drain is best left to a professional to trace down. Oh yes, a defective new battery is possiblity, but highly unlikely.

Sep 28, 2011 | 1998 Chrysler Sebring

2 Answers

Power drains out of battery unless it is driven every couple of days. Battery is very hard to recharge.


Your battery is dieing. After time batteries don't charge as deeply or hold a charge as they once did. Replace your battery and you will no longer have the problem.

Mar 28, 2011 | 1983 Toyota Land Cruiser

1 Answer

My 1993 940 non-turbo just dies when running as if the alternator is bad. However, the alternator has been replaced. It still dies and needs to be jumped. When jumped, it'll run for a bit then die a...


OK the battery in good charge should be at 12.5 volts ( as measured with a voltmeter across the terminals) When the engine is running you should expect the reading to be about 14 volts. Put the lights on ( a load on the battery) and the voltage can go as high as 14.5v. Switch everything off (I mean everything..radio etc) and disconnect the negative terminal to the battery. Now put the meter in ammeter mode and measure the current between the negative terminal and the cable that is now disconnected. It should be really very low current (milliamps at most), switch on the lights to show ourself what that current drain looks like. If the residual current looks significant take out each fuse in turn and return it noting on pen and paper any drop in current when the fuse is out. This process will identify the circuit that is draining the battery. Check the wires and junctions in this circuit for shorts etc. If its lights try removing bulbs until the current drain stops If possible leave the fuse out over night on this circuit and see if this effects the battery's ability to charge and stay charged.

Aug 30, 2010 | 1991 Volvo 940

2 Answers

I just put in a new battery and withina month it drained


something is draining the battery while the ignition switch is off. there are some things which remain on, but their drain is supposed to be very low. get an ammeter, which measures current, and remove the positive battery cable and place the ammeter between the battery post and the battery cable. there should be some very small amount of flow. now pull the fuses one by one while someone is watching the ammeter for you. eventually you will pull a fuse and the current drain will go down to almost nothing. that will be the fuse on which the offending circuit or doodad resides. now put the fuse back in and begin disabling each doodad until you hit the one which is causing the high current drain. typical things are autolocking mechanisms, lights which do not go off in trunks, under hoods, glove boxes.

Apr 09, 2010 | 1995 Mazda 929

Not finding what you are looking for?
Cars & Trucks Logo

727 people viewed this question

Ask a Question

Usually answered in minutes!

Top Subaru Experts

yadayada
yadayada

Level 3 Expert

60667 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21936 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Subaru Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...