| Interior light, glove box, dome, mirror light, trunk light hood light, tag lights, bumper lights, reverse lights, check your instrument cluster for a dark area that should be illuminated. Modern cars are full of electronics and problems with drained batteries are more frequent. My battery drains dead after sitting overnight. A parasitic drain is when an electrical device is using battery power when the car is closed, and the ignition key removed. This circuit is pulling over 250 mA when the car is off and in 'sleep' mode. I pulled every fuse in the box one b. It's not like I live in a very cold climate (Atlanta, GA), but it's usually the winter when the ba. net research, 3 possible reasons (possibly more reasons): main battery cables, parasitic drain (eg sound system or something else), or 100a fuse blown. I am getting a good voltage from battery and alternator is putting out good voltage with truck running. I've been having some kind of parasitic battery drain. Boards > Other Categories > Cars Lobby > '04 civic, parasitic battery drain > '04 civic, parasitic battery drain Discussion in ' Cars Lobby ' started by red7ring , Nov 30, 2011. 3TBI Canadian spec. They had a switch (the ignition key), an ignition system, dash lights and perhaps an electric fuel pump. What the chanced of getting 2 bad batteries? No known issues with the truck, no check engine light. My multimeter indicated a steady 50-60 mA when inserted into the circuit on the negative side of the battery. and was told it was probably due to a duff cell. Testing for parasitic battery drain: The goal is to insert the meter between the battery terminal and the rest of the automotive circuits so that all current flows through the meter. It's not like I live in a very cold climate (Atlanta, GA), but it's usually the winter when the ba. I had a parasitic battery draw that would drain the battery over night. I just bought a brand new battery 2 months ago, and it will not hold a charge any longer. Traditionally, evaluating the battery and charging systems is very quick indeed but parasitic drain demands an extended test. Provides an Easy Method to Connect a Multimeter to the Vehicle Electrical System to Diagnose Hidden Battery Drain. is shorted out. 4 diesel, it's an awesome car - I love it. Customer concerns of batteries going dead over a period of time should be diagnosed using this procedure once any obvious contributing factors have been eliminated. If an E6X, for example, has a KOEO (Key Off Engine Off) draw of more than 80 mA, the DME will set a DTC. The drain was about 3. They come with more control modules than previous year models and hundreds more electrical circuits. Technician B says that the battery should be discharged (loaded) to twice its CCA rating. Anyone else have this problem and was the dealer able to identify the source. I did a parasitic draw test and found that I had about a 4 amp current draw. 5A is because of "SEO 1". Any help or direction would be greatly appreciated. 05 or 50 mA. 5i Limited 4dr SUV AWD (2. (you are supposed to do this without ever breaking connection to the battery but that usually doesn't matter unless its a computer making the draw as disconnecting the battery would reset them all and hide the problem) Now a reading of 0. A long term, low drain rate can deeply discharge the battery, deeper than what can occur with normal aircraft loads. If you have a dual battery system what one should you undo, or do you unhook both. Replaced the dead BMW battery (don't know if orig, we're 2nd owner) and alternator tested fine, so thought we were good to go. It shortens battery life in the short term and for the long haul. This can be a fusing of two wires or a wire that is grounding against the metal chassis of your car. Initial testing will often lead to a quick fix, more times then not it is something simple. My battery drains down in about 10 days since I bought it and ruined the battery. The bad cell in my battery was causing the battery to discharge/spark on my negative terminal and connecting wires, and this led us to believe it was a parasitic drain. Sulfated plates make the battery harder to recharge and can lead to premature failure of the battery. Parasitic Battery Drains Miller, Michael 2016-05-01 00:00:00 ONE JOB I NEVER LOOK FORWARD TO GETTING IS A PARASITIC BATTERY DRAIN ON A LATE-MODEL VEHICLE. 25 amp draw. This probably sounds familiar for some 2004-2008 Ford F-150 owners, as that generation had parasitic battery drain issues caused by a failed park sensor not allowing the body control module to turn off interior components. People often think that a dead battery should be discarded and pay huge bucks to buy a brand new one. Let's say the battery has a 750 CCA and 125 RC rating when new. My calculation of what is considered normal parasitic drain (50-75mA) on a Subaru battery should allow the car to start after three weeks parked without any issues. How to Do a Battery Parasitic Drain Test by Checking the Voltage Drop Across Fuses The left vertical column of the chart above list possible voltage drops across the fuses listed in the top horizontal row. Parasitic battery drain SFV650 Gladius (09-15) Tech. But there's a catch in modern vehicles. [FIXED] Parasitic Battery Drain was created by tmcquinn I'm helping a friend with a 2003 Buick Century. Slow power drains are inconvenient and annoying, and result in a shorter battery life. 25 amps between the negative battery terminal and the negative wiring loom. If an E6X, for example, has a KOEO (Key Off Engine Off) draw of more than 80 mA, the DME will set a DTC. the battery goes dead in 2 days. The maximum allowable current drain is 70 milliamps. Electrical Problem. 3L Been chasing a parasitic battery drain and I've isolated it to the #19 fuse. If the truck sits for a week or two, the batteries will end up dead. Once the above are confirmed we must then focus our attention on battery drain and parasitic current draw. I put my meter to it to see what the drain was, all I see when all doors are shut is. Please also check out the statistics and reliability analysis of the 2015 Subaru Forester based on all problems reported for the 2015 Forester. All ground wires and ground straps intact and in place. For the past several months my radio has been turning off and on randomly but I have not been able to figure out the solution to this. Once the battery is fully charged I am going to fire it up and see what doesn't work just to be certain. Tried to start the car after that and the. 7645 with your digital amp meter takes the guesswork out of a complicated job. I'm not an electrician so I am asking for advice on these two possible detecting procedures:. when charged, the battery tests good. Unhook your battery. This happens when the driver accidentally hits the "battery drain switch," located on top of the steering column. Also I just change the battery 2 weeks ago. Anything longer than one night is almost assured to. New vehicle models make it specially difficult, time consuming, and frustrating. Use the procedure in this TSB to assist with diagnosis of excessive parasitic battery draw to correctly identify if the remote engine starter ECU is the cause. Connect the negative battery cable. I have a 2015 Legacy Outback Subaru that appears to have a battery drain issue. It's a known. Took car to Kwik Fit next day for a battery check and came back no problems. 5 days is nowhere nearly enough time to drain a battery without having something to drain it. The central locking does not work either with the key fob or using the key in the door. So a battery drain, also known as a parasitic drain is a load on your electrical system which should be there that will eventually dissipate the charge in your battery. 25 drain a normal thing or do I have. My friend is having trouble with her 2005 Mercedes C240 sedan. So heres the story, i would wake up every morning and my car is dead. I left one cable off and used a multimeter set to 10 Amps DC to. Saw some YouTube videos on how to check for any Parasitic Amperage Drain in the system. Disconnect the negative battery cable. I've been suffering from battery drain for some time now, but have been unable to replicate the fault on demand until this morning. Hi, chasing parasitic battery drain in my sons truck 2002 Chev Silv-1500 4. How to Find a Parasitic Battery Drain Electrical & Lighting. Mechanic can't find it. My multimeter indicated a steady 50-60 mA when inserted into the circuit on the negative side of the battery. What runs these gadgets? Well, the battery of course. If you have any question of "what can drain a car battery" or any car question, feel free to leave us a comment in the box below. To avoid the chance of a flat battery, it is important to fix any electrical issues that are causing high parasitic drain. Separate from the cell phone-based car starter parasitic current drain, the car itself has a parasitic current drain of 30 mA to support its onboard computer. When a vehicle battery won't maintain a charge, it's possible that you're dealing with a parasitic draw. Coping with all the changes doesn't have to be a drain. The combination of a significant parasitic draw and long periods of non-use can easily cause voltage to drop below 12. Battery evaluation is normally taken care of using automated devices or better still, the PicoDiagnostics battery test procedure where we test not only the battery, but the starting and charging system in one hit. My 43amp hr was only lasting 25min under load not 50 - 60 min as it should so scrapped it. So, how long should a fully charged battery last with a. I would also make sure that all the modules are up to date on calibrations. The battery itself is new, and I've checked to make sure no interior lights are staying on or anything like that. My 98 draws 3. Everything else was up to the driver to turn on and off. In this live class we dive into a battery drain issue on a 2007 Chevy Equinox. [FIXED] Parasitic Battery Drain was created by tmcquinn I'm helping a friend with a 2003 Buick Century. Other folks report similar parasitic loads. The only difference I see between the videos is that my amp draw climbs - from 5 amps to 20 amps before my meters blanks out. Next I took my multimeter and check the drainage and it was reading 50 mA. There's an intermittent clicking sound coming from the rear of the car and it looks like when unnoticed will drain the battery overnight. I performed a parasitic drain test and found that something is pulling 400 milliamps, way over the 50 recommended. 6 volts while under load at the end of the 15 sec. Today I noticed that my van(82 w/aaz) was slow on the cranking, and I thought that I probably had a battery drain. You may have to register before you can post: click the register link above to proceed. Simple things like power supplies for radio, TV, dvd player, etc. crank a couple times and it would be. If you have a parasitic draw, it means your battery is being drained over a 2 or 3 day period or if a massive draw the battery is drained overnight. Re: Battery Drain / Parasitic Drain Issue Nov 29 2012, 12:22pm On my 04 1500 I had a short in the instrament cluster that would kill the battery in a few days if the truck was not driven. In this video I show how to identify if that is your issue and what it takes to fix it. The most recently reported issues are listed below. That's when I decided I needed to look in to parasitic battery drain. A couple of things come to mind: If the outboard has power trim-tilt this usually means it has an alternator for charging the battery. It is an 05 subaru outback 3. During this power down period, the battery drain may mimic a parasitic load, but it's entirely normal. When you disconnect the battery cable the latching solenoid drops out. Often parasitic battery drain is to blame. Disconnect one of the battery cables from the battery, placing an. I took one of the terminals off the battery and then used my multimeter. It would be unusual in my opinion for the outboard engine to be designed with a parasitic current drain, so I would presume that the parasitic current drain must be caused by some sort of non-standard condition. I have swapped out the battery already. 176 A drain on the battery which seems high. If you STILL (keeping in mind your shiny new alternator) lose the ability to start after a couple of days, then the drain could be happening within the battery itself. We offer you a free ArtiBattery101, making you easily get the Battery Test Results. Also when I checked the circuit for parasitic drain, had the car unlocked, alarm off, doors closed etc. I have a 2002 S60 AWD that has developed a perplexing issue with the battery draining. 7A or 700mA but then would slowly go down to. Also, commercial products have been made available directed to the determination of parasitic drain including the following: OTC, Parasitic Draw Tester Product No. The drain could be caused by a short in the system, a small light, or an accessory drawing current overnight. 04A) with supposedly everything off and settled. Attaches in-line to negative battery terminal and cable. We test , not guess. If it doesn't work, I'll move to the next step and see if I can test the original alternator off the Jeep and sell or turn it in for money. The battery was a few years old so it was changed. Overnight, it will drain down to 11. a module that is not going to sleep mode causing a drain, if I remove the battery cable to connect a amp meter that. I assume it isn't the charging system, because it would start up on the capacitor with a drained battery and run. Started pulling fuses and found the following parasitic drains; EXP LPS (10A) losing. My '06 9-3 has a parasitic draw which seems to be from the Infotainment system. This happens when the driver accidentally hits the "battery drain switch," located on top of the steering column. Section 3 talks about the test proce-dure currently followed by ECU suppliers whereas Section 4 explains the system (Infotainment) used for study and analyze battery drain issues reported from. Turn the ignition on again, even for a just a few seconds, and it may take a half-hour or more for everything to quiet down again. I'm troubleshooting a parasitic drain or current draw on my battery causing my battery to go dead overnight. Next, connect an amp meter to the switch to determine the parasitic amperage draw, and locate the excessive electrical drain on the battery. Traditionally, this was done by inserting your DMM's leads in series between the battery's negative post and the negative battery cable. I took it to an auto shop and they check the battery and the alternator, both are good. Battery drain was kind of high at about 42ma, normal is supposed to be about 5ma. - Full charge: when battery is fully charged with a powercharger and put in the car; after 1,5 days the voltage has dropped with 0,4 volt or so. Today I've checked the battery drain using a multimeter with everything off and the car locked. A parasitic draw test reveled the EVO to be the culprit, adding 600-750mA of load on the battery even after the car has been sitting for 15-20 minutes, locked with all doors closed. Technician B says that the battery should be discharged (loaded) to twice its CCA rating. Car battery problems, specially a parasitic battery drain, are difficult to diagnose sometimes. Alternator does charge at proper voltage (over [email protected]) and does charge-up battery when driven more miles. Sulfated plates make the battery harder to recharge and can lead to premature failure of the battery. 9v) I finally got around to connecting a multimeter to check for parasitic loss. 7645 with your digital amp meter takes the guesswork out of a complicated job. Battery was tested and replaced twice,, no change. He thought the drain should not be more than 150. We bought our rx330 beginning of July. Hey yall, my truck has a parasitic drain going on with the battery, if I crank it up and drive it everyday it won't be dead but if I leave it in the driveway for 2 days plus, the battery will completely go down to the point the truck won't have an ounce of spark, nothing will work without a jumpoff. It could be as simple as a frayed wire touching a metal part. There are one or two posts that show the negative battery cable removed and installing a shunt to remove voltage when not in use, Subaru advises only removing the negative cable off the battery sensing cable still attached to the negative post for the parasitic drain. The next thing that has happened is a parasitic drain on the battery which will take it from fully charged to dead overnight. 7L diesel engine, dual fuel tanks and built on or before 5/5/2014 may exhibit a discharged battery and a no crank/no start condition when the rear dual fuel tank selector switch is left in the on position. After watching (and crowning myself an expert) a Youtube video on how to diagnose parasitic battery drains, I'm pretty sure I narrowed it down to one circuit. pluged battery n and starts right up, great! didnt drive it at all. A long term, low drain rate can deeply discharge the battery, deeper than what can occur with normal aircraft loads. I found out my car battery always losing its charge after I leave it overnight. My 2015 Subaru Outback is on its 4th battery. I have a 92 Daytona IROC R/T and since the day I bought the car it has had a parasitic drain. 2015-2016 Escape vehicles built on 3/1/15 through 7/30/15 can exhibit an intermittent battery draw which can result in a dead battery/no start condition. According to my plugging and unplugging of fuses in the engine compartment the ECU B-1 (25A fuse) has a battery drain of 0. Battery is a 100aH. (Milliamps actually). I have narrowed it down to the 15A dome fuse under the hood which goes to the Dome Light Circuit. You can clearly see a reduction in current draw from the battery as the networks begin to sleep and the parasitic current draw from the battery as it settles at 40 mA for over 21 minutes (sleep mode). Crap, I can't believe I forgot about this post. Occasionally when I go to use my car in the morning, it will have a dead battery. Vehicle 2015 Subaru Outback 2. 2v after 16 hours?. Honda says anything under 50ma is normal. At 12 mA that decreases by a factor of 10. My battery has a habit of going flat, Its only about 6months old (same was happening with the previous battery). 6 V and charged over 14V. The technician is testing for parasitic battery drain and needs to know what values are acceptable. My car has recently been experiencing what I think is a parasitic battery power drain. Parasitic battery drain - Room Fuse - Advice? Found the problem: I measured all the fuses inside the car and in the engine bay that I could and the only fuse with any draw is the room fuse. 5 days is nowhere nearly enough time to drain a battery without having something to drain it. The current drain comes from the circuit or circuits protected by that fuse. The target parasitic drain is < 80 mA and stable throughout. The technician is testing for parasitic battery drain and needs to know what values are acceptable. Hi there Fellw Alfatisti This is my second Alfa 159 - 2. com But a battery-power drain can also be the work of a bad alternator diode or even a faulty battery. If there is an electrical short in the vehicle or a malfunctioning accessory it could be drawing much more than its normal load causing a drain on the batteries. This bulletin provides the diagnostic procedure when checking for excessive battery draw for any Subaru model. Now that we have verified that the battery is experiencing a parasitic draw, we can move to exploring the different reasons and parts that can be pulling on your car's battery. Note: To use additional test leads, the Parasitic Drain Tester must already be connected to the negative battery terminal. It sounds like you only have a problem with parasitic drain part of the time. Battery seems to charge to over 12. When the fuse is in place, I have a draw of ~140mA, removing it reduces the draw to ~30mA. I was wondering if anyone had any real-world insight into this topic of parasitic battery drain while parked, and why the manual says to put the car in rev. Once the battery is fully charged I am going to fire it up and see what doesn't work just to be certain. 2014 Silverado parasitic drain? Silverado Car Forums. I can't wait to make some mods - egr and dpf delete. S-10 & Blazer - S-10 Battery draining - I have a 2001 S-10 Extreme. the issue with my car is that the battery keeps dying. 5A is because of "SEO 1". You can clearly see a reduction in current draw from the battery as the networks begin to sleep and the parasitic current draw from the battery as it settles at 40 mA for over 21 minutes (sleep mode). So, it is important to do. Have your supervisor/instructor check your connections. It's the same 1. Dealership asked me to sell my car back to them & upgrade to newer model (low kms 60000km). When the fuse is in place, I have a draw of ~140mA, removing it reduces the draw to ~30mA. I did a parasitic draw test and found that I had about a 4 amp current draw. Tried to start the car after that and the. You might get lucky. When the cause of the excessive current drain has been located and repaired, remove the J 387S8 and connect the battery ground (negative) cable to the battery. However, right out of the gate I am having trouble with a parasitic 12v battery drain. 7v resting voltage. Parasitic battery drain test. You can clearly see a reduction in current draw from the battery as the networks begin to sleep and the parasitic current draw from the battery as it settles at 40 mA for over 21 minutes (sleep mode). parasitic drain went down to 9ma. It sounds like the vehicle has what is known as a ‘parasitic draw’. They had a switch (the ignition key), an ignition system, dash lights and perhaps an electric fuel pump. Battery evaluation is normally taken care of using automated devices - or better still, the PicoDiagnostics battery test procedure where we test not only the battery, but the starting and charging system in one hit. They mentioned a parasitic drain but knew nothing about it. I have a 2015 Legacy Outback Subaru that appears to have a battery drain issue. And at -19°C (0°F), the days are reduced to 25 percent of the days it could have lasted in warmer temperatures. Section 3 talks about the test proce-dure currently followed by ECU suppliers whereas Section 4 explains the system (Infotainment) used for study and analyze battery drain issues reported from. Axleaddict. If I don't drive the car for at least one-half hour each day,the. Vehicles equipped with Electronic Control Modules can exhibit a failure mode within the ECM which can result in a high parasitic current drain on the battery. The drain value is 0. Hopefully, your vehicle has features that will prevent this from occurring. It has an aftermarket alarm and aftermarket sound system. Starts fine within a few days of use but if longer than a week the battery is dead. There are one or two posts that show the negative battery cable removed and installing a shunt to remove voltage when not in use, Subaru advises only removing the negative cable off the battery sensing cable still attached to the negative post for the parasitic drain. 7 amp range to under 100 milliamps. For years I just ran it. Hopefully, your vehicle has features that will prevent this from occurring. Next connect an amp meter to the switch to determine the parasitic amperage draw and locate the excessive electrical drain on the battery. But the problem was that the truck would periodically be dead like 12 hours of sitting still. So I've been having this parasitic battery drain for some time now. It sounds like the vehicle has what is known as a ‘parasitic draw’. if my car sits for more than 8 hours the battery will be completely dead. Parasitic Battery Drains Miller, Michael 2016-05-01 00:00:00 ONE JOB I NEVER LOOK FORWARD TO GETTING IS A PARASITIC BATTERY DRAIN ON A LATE-MODEL VEHICLE. Common drains include glove box and trunk lights that come on, or remain on, when they shouldn't. This battery goes dead overnight! Join us as we look into different ways to test and verify a parasitic battery drain. Finding the source of a battery drain can be frustrating. Installed correctly, they draw a small amount of power and won't drain your battery. Recently, I installed a new. Parasitic Battery Drain Test To check if something is draining your battery while your bike is turned off you need to test for current, not volts. If the light is stored for months/years with batteries in, it is important to know about this, or the batteries may be empty when the light is needed. Parasitic Drain. Video tutorial on how to find a battery drain on your vehicle. This may be due to a cluster reset which is waking up the vehicle buss. Battery Parasitic Loss Tests -- Vette Techs Please Look! After experiencing an Optima RedTop battery that would lose enough of it's charge in a week or so of sitting in the car to barely crank over the engine, I decided to do some battery parasitic loss tests. Make sure you have a fully charged battery. Cancel View cart. 7 amp parasitic draw. If it is you should see the battery or alternator light on, it indicates that the alternator is not creating the necessary voltage to charge the battery. Learn how to give them new life with our step by step battery reconditioning guide. Video tutorial on how to find a battery drain on your vehicle. I have had more drains from blown bulbs than any other thing oher than a faulty cell in the battery. Technician A says that a good battery should have a voltage reading of higher than 9. I have a drain somewhere in the truck, I just don't know where. i have a 2002 s60 awd and the battery has been draining, it only takes about a day for the battery to go dead. How to troubleshoot Mercedes-Benz battery drain Step 1. I have replaced the starter, alternator, and battery. I have had to jump start the car on several occasions. If you turn your engine off and the vehicle's electrical components continue to operate, this is called a parasitic drain. I also disconnected the plug/cable on the alternator, no difference. The parasitic draw was normal, and the battery passed all of the load tests I tried (I did all the different types I mentioned above). I just purchased a 2011 Prius with 67,000 miles and I'm looking forward to a good decade of service. Jumped it and died in 5 seconds. The drain value is 0. They always blame the battery. Ok guys, I created a profile JUST to get this fix out there for a parasitic battery drain on my 2003 Suburban. 25 and declining. Pulling Fuse 42 worked, dropping the draw to a nominal 0. My coworker and I have been trying to find out what is wrong with her car. She bought it 4 months ago. As we are all on here trying to make it better for the next guy, I will share some things I found while troubleshooting for a parasitic battery drain. Electrical Problem. I've since measured the parasitic battery drain at the positive battery terminal. So I got out my multimeter plugged the leads into the proper jacks for a 20 amp test. Installed correctly, they draw a small amount of power and won't drain your battery. 4v (bought a new one and it's in its way)-the drain is approx. I became suspicious of a parasitic draw on the battery so I checked it out with a meter in line with the battery (neg terminal). aerolithium. This will help me from killing the battery with the parasitic drain issues while I continue to troubleshoot the. The drain value is 0. This 2001 Lexus RX300 would drain the battery periodically when the vehicle sits. Have you got alarm/immobiliser ? They can trigger "silently" for no reason for period of time if broken and can drain your battery and then during brownout can reset back to no draining. This bulletin provides the diagnostic procedure when checking for excessive battery draw for any Subaru model. I will follow your advice and test the alternator in depth. Good evening, I have a 2006 acura tsx I am having a parasitic drain problem. I suspect your issue is the alternator so you can do the load test. 05 is a good avg) or lower is good. The use of the term may not be entirely correct, but it is in very common use and has, therefore, become standard nomenclature. First try to understand if there is a parasitic drain. I first connected the hot battery to lower the windows and drew substantial fire from the connection. It has an aftermarket alarm and aftermarket sound system. 176 A drain on the battery which seems high. After swapping out what may have been a good battery I am still encountering the dreaded no start condition. Once the battery is fully charged I am going to fire it up and see what doesn't work just to be certain. They called around 9 to let me know that there is no parasitic drain but the issue is because the battery does not have enough cold cranking amps so therefore it is bad and needs to be replaced. It has an aftermarket alarm and aftermarket sound system. Thanks! :grin. Subaru Forester owners have reported 7 problems related to battery dead (under the electrical system category). battery parasitic drain test adapter. Meet your eld electrical load detector honda civic forum glowshift gauge parasitic battery drain hondacivicforum how to find a parasitic battery drain 11 s with pictures signs your car battery is dying honda service meet your eld electrical load detector honda civic forum 07 Civic Overnight Battery Drain Honda ForumHow To Find A Parasitic Battery…. Parasitic drain can result in various drive ability problems causing the computer to set into false trouble codes. Parasitic Battery Drain Test. Battery drain test (parasitic draw) in your car and how to use a multimeter DIY. 2 Diesel Ex model. Purchased the car back in early 2002 as a stock gsr. I started troubleshooting my parasitic battery drain and I'm not getting very far, I'm poor at electrical stuff. This happened to me twice since I didn't have time to think about troubleshooting. Bottom line found a place that repairs the TIPM for about a 1/4 of the cost of a new one. I can't wait to make some mods - egr and dpf delete. hi everyone. Draw measures -2. Fitted on Saturday and the car was used every other day at most. 3L Been chasing a parasitic battery drain and I've isolated it to the #19 fuse. During this power down period, the battery drain may mimic a parasitic load, but it's entirely normal. titled Parasitic Current Drain for examples of acceptable parasitic loads and how to accurately test. Subaru Outback Battery Drain 2 Answers. My mutimeter is showing a parasitic battery drain / amp draw of 1. I have read dozens of threads on this forum and on the Internet about parasitic battery drains, but am not sure where to go next. Leaving the rear hatch open seems to drain the battery. After looking around online looks to be a parasitic drain on the battery. You can use a digital multi-meter (DMM) to measure a parasitic current drain, which Mercedes-Benz refers to as "quiescent" current draw. now that battery keeps dying as well. Parasitic Car Battery Drain Causes Car electrical systems were once so simple. battery parasitic drain test adapter. As far as I know it should be around. After testing the alternator (which was fine) we replaced her battery. the battery goes dead in 2 days. 6 V and charged over 14V. I know there are several questions on here about finding the source of a battery drain (like Battery drains by itself when vehicle is parked (parasitic draw)). I have a question regarding parasitic battery drain on a dual battery system.