Car Battery Drains Overnight Or After Days Of No Use! PARASITIC DRAIN

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Car battery drains overnight(dies), or after days of no use, parasitic drain, parasitic draw, engine will not start. How to easily find/locate/identify the source of parasitic battery drain on your late model car, vehicle, SUV, truck, or boat without losing computer or sound system settings/programming. Enjoy!
ATTENTION: The testing methods shown in this video can be performed using either battery terminal(sometimes one end of a car battery can be much harder to get to, or one cable has very limited movement), but it's much safer to use the NEG battery terminal since it's connected to the vehicle's chassis/engine ground.
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26 сен 2024

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Комментарии : 578

@electronicsNmore 4 года назад

ATTENTION: The testing methods shown in this video can be performed using either battery terminal(sometimes one end of a car battery can be much harder to get to, or one cable has very limited movement), but it's much safer to use the NEG battery terminal since it's connected to the vehicle's chassis/engine ground.

@SmilingDevil 4 года назад

electronicsNmore ah you noticed...

@Kuldeep_Giri 4 года назад

How much time is normal for a battery to drain in a parked vehicle

@samyelts8498 4 года назад

Hello there I bought a Ford Sort Trac and bought a brand new battery but it is still draining. I took it to AZ (you know the Zone) and they tested the battery and Altintor both were in good order. I saw the you said Security system could drain the battery too, where would I find that wiring/fuse (it dose have a Thift light indicator on the dashboard) .? Please get back with me at your earliest convenience thank you 🙏

@skyrc8 3 года назад

hello, do you do a product review? We have a product, I can send u a sample

@robertcarlisle4535 3 года назад

@@SmilingDevil 3rd 3rd 4th 4th

@DGinNC 2 года назад

I worked at a car dealership for 15 years (as an aftermarket electronics installer). It always amazed me how many technicians didn't have the slightest clue of how to diagnose a voltage draw. Before some tech gets heated over this comment, the percentage of ignorance, is about the same among aftermarket electronics installers. I'm not meaning to be insulting. The point being, never stop learning, I've learned things from people that were just beginning, and I've taught things to 30-year vets. Our ego only serves to limit what we allow ourselves to take in. Happy wrenching.

@simonmasters3295 10 месяцев назад

Good comment Personally I get into a wierd mental state which is "I understand enough - why is what I am doing still going wrong" the irritation kicks in and I lose the ability to think clearly.

@DGinNC 10 месяцев назад

@@simonmasters3295 I always try and just walk away when that frustration sets in, go talk with another tech about what they're working on for a few minutes or do something completely unrelated. Look at the problem fresh again.

@MultiPleaser 9 месяцев назад

So true. At the nationally famous HamVention I was told by a guy selling all sorts of electronics from a huge booth that if you increase the voltage of an LED then it'll therefore draw more amperage. I said, no it will actually draw less amperage, I've tested dozens of them. We couldn't agree. At another booth they were selling humongous TV antennas for the home. I asked how many more tv channels these would pick up. He said the same number as before. So I asked, "What's the point in buying this expensive monstrosity?". He was now trapped in a corner and couldn't answer. FYI, when you install a huge antenna 50 feet high, you'll get to stations from all over the tri-state area! (Unless, of course, there is no "tri-state area", such as Alaska, Hawaii or the middle of Texas.)

@4vepvik781 7 месяцев назад

Well said..Ego n stubborn attitudes kill learn continuity.😅

@kennethjansen9002 7 месяцев назад

Thanks your awesome wish I could pick your brain

@daviddawson3366 Год назад

I use a infrared thermometer to check for the hotest fuse in fuse box to locate the short I the circuit..sometimes you can trace the heat on the wires to the voltage drain

@raulgutierrez8112 6 месяцев назад

While the vehicle is off correct?

@carlosflamenco6205 5 месяцев назад

Darn we think alike makes sense we are looking for a hotter fuse then any of the others

@dogsbyfire 3 месяца назад

That is a great idea! Thank you so much for posting it.

@GaMt13 2 месяца назад

I was thinking of buying one anyway. Got a recommendation? Thanks.

@ProjectFarm 4 года назад

Great video that'll help a lot of people! Thank you for the video and always a thumbs up!

@electronicsNmore 4 года назад

I hope it does. Thank you very much for watching!

@fvrrljr 3 года назад

HEY I KNOW YOU Great to see Ladies and Gentlemen it's Project Farm!

@MARTINN7777 3 года назад

Hey,PF,whatcha doin here??

@sillygoosesmallengines1994 3 года назад

Project Farms is such a great guy, just the fact he checks out lots of others channels and give his support

@AXNJXN1 4 года назад

Only two decades later.... I FINALLY found someone who can not only explain it, but 'explain', what and why this is important... KUDOS!

@electronicsNmore 4 года назад

Thanks for the very nice comment! Glad you enjoyed the video. Be sure to look over my extensive video playlists below for many other videos of interest to you, use supplied Amazon links to support my channel when making purchases(No added cost to you), and share links to my videos with many others on social networking sites. Thank you, and stay safe! ru-vid.complaylists

@kimcooleyballoontwisting6830 Год назад

This video is the best video I’ve ever watched on RU-vid. Perfectly explains each step. Now I feel my life’s nemesis, my wife’s piece of crap 2013 Ford Escape, will lose again.

@PRACERZ 4 года назад

Done this during my career working on cars. Very well explained for anyone too fully understand. Imho

@koitorob 3 года назад

Imho, you should have used TO

@foufou33g 3 года назад

the fact that disconnecting the car battery to do can result in an expensive trip to the dealer speaks much about the sad state of affairs in the car industry ......

@electronicsNmore 3 года назад

Really no reason for it, there should be a memory backup system using a capacitor. Thanks for watching!

@leh3827 10 месяцев назад

That is a topnotch complete summary and delivery of testing for a parasitic draw. Thanks

@Jodyrides 2 года назад

My wife’s V W battery would go dead overnight. Battery was still under warranty so I replaced it. It went dead overnight. To make a long story short, I called the service department and explained to a lady mechanic over the phone what was happening. She asked me if the car had a Clock built-in. I said yes..She said that’s the problem. I think her and hung up. I didn’t believe it until I unplugged the clock and my test made her stop showing a current loss. It was the factory quartz clock that was killing the battery overnight

@Itsme-xv7jc 2 года назад

I have the same problem I drive a Mercedes-Benz E320 every morning I get up it's like my car will not start or it may start no lights won't come on the doors won't unlock the radio won't come on then the next morning I wake up and try to start it up it won't do anything and I do have a built-in clock

@mtthw741 Год назад

We have a 2013 Passat that we can’t figure out why this keeps happening. Every couple of days it’s dead

@JasonLee-lv7tm Год назад

@konstantintrehagyrevopoulo972 Yea, after you test battery and charging system and those test good, and also this is for when battery dies overnight obviously, you run these tests to find out what the actual problem is. Which clearly was not the battery or charging system

@umermostwantedstranger Год назад

How did you unplug the clock

@m_w501 Год назад

@mtthw741 2011 Jetta TDI. Same issue. I don't have a built-in clock, though. Already replaced the alternator. Not sure if I need to waste money on a starter or not. Definitely wasting money on new batteries.

@yardlimit8695 2 года назад

WITH SO MANY USELSEE VIDEOS OUT THERE THESE DAYS,,,,,,,,,,IT'S GREAT TO RUN ACROSS ONE THAT REALLY HELPS . THANKS.

@mrdanger4851 Год назад

This works because at 10amp setting which uses a shunt allowing for current flow...Thanks for this simple comprehensive video

@robbeam5599 9 месяцев назад

Good video the only thing I would add is if you don't want to jump in and out of the vehicle to look at the meter what I do is use my booster cables. I connect one clamp to the post on the battery and the other clamp to the ground clamp of the vehicle. This allows me to run the booster cables inside the vehicle then I can clip the leads of my meter between the two booster cables and have it in a spot where I can read it easily without getting in and out of the vehicle or moving too much it's really handy when working on a vehicle like my F-150 that has the fuse box in the passenger side footwell. Again great video with lots of good information thanks for the tips on how to not lose settings

@michaelboyle1983 7 месяцев назад

Great idea. Thanks for sharing it, and God bless you!

@2565130730 9 месяцев назад

thanks so much! easy to follow and it makes sense! Found my issue immediately, after wasting time at the "dealership" shop and with a private garage. Looked to RU-vid and found your video, and voila problem solved.

@elvis1882 Месяц назад

hey, in the video he says take the negative and throu it to the side but I see that he alegator cliped to a red wire and that is the one he poked the terminal with. Did I observe right? Please read twice.

@BigDadio1967 3 года назад

Just taught this to a friend who has been dealing with a drain on their car for a year. Had to disconnect the battery every night. Finally talked with me about it and they wanted to know where I was over a year ago.

@electronicsNmore 3 года назад

Many people don't know these things, some are lucky to have friends that know, or they can visit YT. :-)

@captinhoop Год назад

I know you made this comment 1 year ago but do you remember what car it was causing the problems?

@BigDadio1967 Год назад

@@captinhoop I know it was a early 2000s Suburban. Don't recall if he ever figured out where the drain was from.

@infernaldaedra Год назад

@@captinhoop It can happen to any car the causes can be alarms, stereo circuits, alternator, really anything in newer vehicles it might take longer to find the root cause.

@mickchaganis6607 3 года назад

Thank you for this easy to understand and well explained video, I have a new battery and it's draining if don't drive it every day, won't start.

@Lobsterman5481 3 года назад

Did you find a solution?

@mickchaganis6607 3 года назад

@@Lobsterman5481 I've been lazy, just disconnect my battery at the weekend 😂😂

@Lobsterman5481 3 года назад

@@mickchaganis6607 LOL tell me about it.

@jasonvizcarra709 3 года назад

I have the same problem. I barely use my car since covid and working from home.

@alessandraradhe2744 3 года назад

Thank you for this video and detailed explanation that even someone like me, 0 experience, could understand!

@electronicsNmore 3 года назад

You're welcome. Glad it was helpful!

@drcrazy121 2 года назад

m MN

@HenryMorgan-kp6cy 6 месяцев назад

Best parasitic diagnosis video out there. Especially the jump wire for the memory 👍

@electronicsNmore 6 месяцев назад

Glad you enjoyed the video! Be sure to check out my extensive video playlists for many other videos of interest to you and share. Thank you

@michaelambrosia 2 года назад

Thank you sir. Used this method and found the drain on my battery- a trailer hitch adapter.

@electronicsNmore 2 года назад

Glad it helped

@tectalabyss 4 года назад

Thank you Doug. I use an OBD-ll battery back up port ,has they are supposed to keep the backup memory in the ECM. With all the new crap that are on timers to put them to sleep, it can be a headache to do the tests needed at times. Even opening the door can wake up some circuits. Best way I found was to open the door and fix the switch to fool the car into thinking all the doors are closed and just wait till it goes back to sleep. Liked,Shared. All my best.

@electronicsNmore 4 года назад

I prefer those. The power is directly to the computer, which is perfect when swapping out car batteries. Thanks for watching Bobby!

@timewilltell4969 2 года назад

@@electronicsNmore m:

@jimmyjarreau8587 2 месяца назад

Very good explaining, if someone can’t follow those instructions, they shouldn’t even Elbe drive a vehicle let alone work on one 👍

@scottlevy3274 2 года назад

that engine bay is sooo clean

@richardsimms251 7 месяцев назад

Learning is life long.

@condor5635 Год назад

Great video. Probably be better approach to do this test on the negative post versus the positive post.

@samsen201 7 месяцев назад

Very detailed and very well demonstrated. Thank you for the content.

@ab_ab_c Год назад

There you go! You did this vid much better than the older vid! Thanks for sharing. That post clamp probe clamp jumper wire is a clever technique, too!

@tonysova4687 4 года назад

Good way to get that dmm connected.First thing to do is use your amp clamp to check what it's drawing saves on meter fuses

@Spark-Hole 2 года назад

Good tip, straight the meter pin above the post, and lift.

@JisINSANE3 Год назад

Just bought a 04 impala SS and it had this problem. I did the multi meter test on it and out of all things, The battery run down relay was causing the parasitic draw. 900 MA draw with the relay in to 30 MA with the relay pulled.

@BurkaLifter Год назад

You need to trip the hood latch, and clamp any door sensor shut and leave door open if you need to get in car during test, you also need to let any arming system time out so car thinks it is set for the night

@chetsands1609 Год назад

He explained these steps in video before this one.

@balbutie 11 месяцев назад

have a 2008 ford escape dont need to trip the hood latch , just the doors.

@gfriedman99 7 месяцев назад

@@balbutie ford focus has a hood switch

@FASTECAUTO 3 года назад

I love your precision...

@AnthonyFrancisJones 10 месяцев назад

Great - do be VERY careful you know that there isn't a large current draw. Using thin leads or shorting them can cause them to get very hot, melt or even vaporise! In the same manner that a fuse works. This aside unusual current draw such as failed alternator diodes etc. is a real pain!

@dbitMedia Год назад

How do you guys do this inside the passenger glove box fuses? I am 6'3" and 190bs, I can barely sit in that sport, let alone get my hands in that space and hold the leads close enough together to get an accurate reading!

@fvrrljr 3 года назад

RADIATOR!!! yep that one is of the hidden culprits too especially with aluminum radiators because of galvanic corrosion and electrolysis. quick fix is a radiator cap with zinc anode. DAMN lost my beer buzz had to concentrate. worth it though to add to this post

@electronicsNmore 3 года назад

My other video, which involves what you're saying. :-) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-x-gceYx_3RE.html

@fvrrljr 3 года назад

@@electronicsNmore watched and approved i Like, OLE!

@bjb7587 Год назад

Very useful information, thank you. But take off your watch with the metal band before working on a battery.

@thomascranston8503 Год назад

If you have a Ford Hybrid the problem may be the main hybrid battery (not your 12 V battery) If that big battery is defective it will drain the 12V one that starts the engine. This happened with Ford Cmax Hybrids. My wifes new CMax 12V would run down overnight. Many trips to the dealer for months. It got so bad that she was afraid to change any settings. They finally fixed it. Gave no reason what the fix was. I later read that a defective main big battery was the cause.

@NETBotic 4 года назад

Warning, do not do this on a DeLorean with a Mr Fusion unless you have spare fuses for your multimeter.

@electronicsNmore 4 года назад

🤣

@NETBotic 4 года назад

@@krystal5887 I knew I should have RTFM...

@kfiscal01 2 года назад

It will also skew the Flux capacitor.

@Feemy Год назад

My car alarm has been going off at random times for the past month. Looked up what it could be, got battery replaced because that was not holding a charge and it was 8 years old anyway. Problem is still there with brand new battery, I purchased OBDEleven and scanned the modules, and it came up with fault code 01134 (H2) alarm, implausible signal. Google search suggests possible fault with fuses/wiring/alarm unit. Got a breakdown assitant to have a look and he suggested there is parasitic drain somewhere and that i take it to a car electrician who would need the car for a few hours to go through every electrical fuse etc. He also told me that these VCDS and ODBEleven devices dont really pinpoint the issues, they only point your in the right direction so that you can investigate and diagnose further. So after watching this video my hunch is that some electrical component is causing parasitic drain. I fully charged my brand new battery (it read 12.7v) and 4 days later the alarm went off. Checked the battery voltage and it was at 11.6v suggesting that something was draining the battery when my car was not in use.

@jodaddysdodgegarage3533 2 месяца назад

Great video! Excellent explanation and straightforward. Well done 😎

@dennissecor8092 2 года назад

Excellent video, great job, thank you for sharing!

@electronicsNmore 2 года назад

Glad you liked the video!

@markodragojevic9892 3 года назад

You’re supposed to wait ~5-15 minutes after the vehicle is locked, doors closed, and/or smart keys out of vehicle for modules to go to sleep for accurate readings

@electronicsNmore 3 года назад

Yes, if you saw a high reading show up, to verify that it's a parasitic drain, you'd check it again after 10-15 minutes.

@microtechmachineshop Год назад

Who's got 5 to 15 minutes

@bend0matic 3 года назад

We had an e350 van pulling 3500 mA of current. It was the alternator. Mind you, the alternator would charge fine but it was drawing mega amps overnight through it.

@electronicsNmore 3 года назад

Faulty diodes.

@bend0matic 3 года назад

@@electronicsNmore is that right? I replaced it with a new $115 motorcraft one and all my problems went away thank god.

@DELAWAREBOWHUNTER 3 года назад

I tried it on my Tesla and the meter exploded!

@electronicsNmore 3 года назад

Nice. LOL

@Officer239 2 года назад

Teslas are pieces of shit 🤣

@roymartinez2230 Год назад

😂

@matthewstone5158 Год назад

Good lol

@don28392 Год назад

I tried and my tesla exploded!

@S.0.G 3 года назад

So I’m assuming you can’t just look at each fuse to see if it’s burned out and then replace the fuse? Or this different I’m confused lol

@andrewevanoff1192 4 года назад

Some newer vehicles may run Evap pump during off hours. This will draw some current from the battery but it's totally normal. Also, the clamp-on current meters are not very accurate at the low end. I wouldn't trust it for measuring very low current. It's best to verify it's readings with a meter connected in series with the battery.

@electronicsNmore 4 года назад

Hello Andrew. The particular clamp meter I used was designed for leaking current testing, so it does work well on the low end. Not every method is 100% reliable, but the one shown in this very is extremely useful. Thanks for watching!

@peteahwanzo1504 4 года назад

@@electronicsNmore I think he was just pointing out that you need to know the behaviour of the vehicle you are working on

@electronicsNmore 4 года назад

@@peteahwanzo1504 Correct, he was referring to the LDP(Leak detection pump) that some newer vehicles have. I'm not aware of any that run with the car parked with the key out of the ignition.

@peteahwanzo1504 4 года назад

@@electronicsNmore I'm not aware of any of the top of my head either, but that does not mean they do not exist.

@missinglink208 2 года назад

@@electronicsNmore A 2017 Lexus GX460 does just that. Startled me the first time. You walk into the garage hours after the car has been parked and the panic sets in .

@mineralsoldcoinscoppersilv7627 4 года назад

good.

@andicus1 Год назад

Very helpful! It seems so obvious, once someone shows you how to do it. :D

@simonmasters3295 10 месяцев назад

Yes! Google and content like this on YT can restore the sanity of beginners and experienced practionners alike!

@keyvanmohajertaleghani2725 Год назад

Thanks a lot for your excellent video, I had this issue since couple of months ago the car couldn't start strongly and when I checked the battery the voltage it was about 11v, my battery is not that old I bought it 2 years ago. After I watched the video, I checked the battery current when the switch was off and the current was about 3 Amperes, I removed and put back some Relays/fuses and play with wires behind the both fuse boxes suddenly the current goes down to almost 0A then I drive the car for 1hr and the battery Voltage is about 12.5V now and the car is starting with no problem, I don't know what was really happened, hopefully the problem is solved.

@CoreyOBrien-k2e 6 месяцев назад

The lead didn't need to stay on the terminal when pulling the clamp of the terminal. It much safer pulling the ground off, you have no worries of the clamp arching on another part of the car.

@Makrov-k7n Месяц назад

So helpful. Thank you.

@darrylm3627 3 года назад

Using the clamp is cool Great Tips, Good Stuff 👍 Thanks!

@electronicsNmore 3 года назад

Glad it was helpful! You're welcome Darryl. Be sure to rate thumbs up, consider subscribing if you like a wide range of helpful and informative videos, and look over my extensive video playlists below for many other videos of interest to you. Taking one minute to share a link to my channel with others on social networking sites would be greatly appreciated. Thanks ru-vid.complaylists

@enduro-parts-aus 4 года назад

Really simple to understand thank you

@electronicsNmore 4 года назад

Great to hear Rexy! Be sure to look over my extensive video playlists below for many other videos of interest to you, use supplied Amazon links to support my channel when making purchases(No added cost to you), and share links to my videos with many others on social networking sites. Thank you ru-vid.complaylists

@jefferyscruggs2171 2 года назад

Great explanation very good thanks!

@perrymckinney6146 2 года назад

A lot of cars have retained assessory power. It will trigger upon putting power to the positive battery cable, let about 5 minutes to pass while connected, the retained power should time out by now and battery drain should drop. I thought sure I had something staying on because there were a few decent sparks when connecting battery, here it was the retained assessory power being on, it lets you use the radio, put windows up and down, it times out after maybe 5 minutes.

@chetsands1609 Год назад

So what did you do to fix it?

@patricklantz9208 9 месяцев назад

Great work. Very clear

@mp4338 Месяц назад

If you accept to loose the radio voltage you can measure the voltage drop more simple w/ampermetre in serie w/the pozitiv cable and pozitiv battery or on the minus cable. The test on the link is do not loose the voltage on the car during the test.

@colinellicott9737 7 месяцев назад

Thx for clear demo on post/ connector management.

@leonwilson7484 Год назад

Try running g a ground wire from the Alternator to the ground on the battery.Fixed my problem on 2005 Mustang

@peternewman3487 Год назад

Normally if you have a faulty alternator diode the battery charging warning light on the dash will glow dimly in the dark.

@HeavenReservation 2 года назад

great, what did you set the multi meter on?

@bft5775 Год назад

Thanks for your explanation. 🙏

@CageyLeigh Год назад

Can you disable an alarm system on a car? I assume that if it had a fuse, then you would have already identified the alarm as the culprit?

@Blazeww Год назад

My battery went died once today.... Checked everything and nothing was on and doors were closed... Died again... So I finally get to my destination after work (got a jump start) and I'm looking around scared to shut off the car... And I think you myself what could be on if nothing seems on... Then I just happen to look up and think we'll that lights blown out and.... The button to the blown out buln in the sunglass holder built into the roof was popped out an on.. No bulb so couldn't tell it was on... Apparently it still draws power even if the bulb is dead. Now we know.. 🤔 If you gotta power issue and a blown bulb. Check that the buttons pressed into the off position. And it apparently takes more power than charging a cell phone to cause I can leave my phone in the car for hours and it won't die as it charges. But that blown light was on fire 30 minutes and killed the battery enough to cause a crank and click click no start...

@petropete3122 2 года назад

Awesome vid and tricks. Will help me indeed 👌. Tks for sharing

@meannejohnslee4314 Месяц назад

if you start pulling fuse can do it on older car but from years 2010 above its not a good idea some fuse if you pull and put back will wake up some dormant conections

@ACommenterOnYouTube Год назад

Both my cars have a .05 amp draw after taking video for 6 hrs .... neither car went above .05 amps but yet both batteries are dead around day 7 ... Both batteries were fully charged, engines cranked over super fast after a full re-charge, but 7 days later, both batteries are flat dead. Explain that 🤷🏽‍♂️

@Arizona_rider 3 года назад

Heres my problem: I was working on something and was putting the battery cables back on. While putting the negative on my ratchet is a long handle flex head. While wrenching I was looking around and the handle hit the positive post. The battery never acted properly since. Had it tested and I killed 2 cells but it worked for awhile.

@bike4peaceRTW 2 года назад

If your vehicle is still under warranty you should be taking it into the dealer to test for parasitic draw!

@electronicsNmore 2 года назад

Yes, I agree.

@bangkokstallion 8 месяцев назад

That coolant overflow doesnt look right

@benjaminkorenarmwrestling9053 5 месяцев назад

Doing the lord’s work with this video! 😂

@roybuckle7576 3 года назад

Just measure if there's any current flow across each individual fuse. Note the fuse pins are accessible while in place

@electronicsNmore 3 года назад

No, you measure voltage drop across the fuse.

@balbutie 11 месяцев назад

@@electronicsNmore how much voltage is acceptable across the fuse? thank you.

@grampabadger 3 года назад

My Chevy K3500 had that problem. I pulled the clock fuse and it solved the problem. Who needs a clock, anyway?

@electronicsNmore 3 года назад

At least you figured it out. :-)

@henryjohnson5979 2 года назад

I already watched Scotty killer do this but I liked your video too

@DorothyRobinson-h4o 6 дней назад

I have a question. does a battery pack need the circuit board, IF on each "charging" each cell is removed and individually charged, to the same compacity. Then allowed to rest. And the position in the pack is rotated for each use?

@danschenck9442 3 года назад

disconnect negative terminal.. then use volt meter or test light,, if get power to fuse . means there is your drain.. means device to fuse is grounding out ,,causing drain

@gfriedman99 7 месяцев назад

So this means there is a ground short somewhere. thanks

@raftonpounder6696 3 года назад

Brilliant! Thank you.

@mr808steelers 2 года назад

Thanks! I did the parasitic drain test and removed a fuse for A/CON. The meter dropped from 2.79 to .030. Left the fuse out for the night and the next afternoon car started right up! Only problem now is I don’t have air conditioning. What can I do to see what’s causing the ac to drain the battery? And, eh yo, I just subscribed 🤙☺️

@electronicsNmore 2 года назад

Doesn't make sense. The A/C is connected to a circuit that gets power when the ignition key is in the ON position. Maybe try pulling the wire connector out of the blower motor or blower resistor while the meter is connected to the battery. One may be causing the problem. There's a work-around if you don't feel like spending a lot of money on mechanics. You can connect a standard 4 pin 30A relay to the A/C fuse circuit(between pins 30 & 87). You cut the wire leaving the fuse box after the fuse to connect the relay. Power will only be allowed to flow into the A/C circuit when the ignition key is in the ON position. Power from any 12V source that becomes active when the key is in the ON position goes to pin 86, and pin 85 to ground.

@TulsinDerbeck 2 года назад

Yeah, I may have the same problem. It's not the ac itself but the AC compressor is drawing a charge while the vehicle is off. (Its hot to the touch when the rest of the engine is cold). I changed the blower motor resistor but that didnt change anything. Did you find out what the problem was for your car?

@mysterious_codm6812 Год назад

@@TulsinDerbeck install a on/off switch in the inside

@Jagjeff66 2 года назад

Don’t tell people though that cars today have multiple modules and networks and it still takes a long time to find out what’s turning on causing the draw.I have to use an occiliscope to watch what network turns on and what module is waking up for whatever reason.This stuff is not as easy as it looks

@electronicsNmore 2 года назад

This method works just fine on new vehicles, unlike the older method I show in another video.

@404notfound..... 2 года назад

Excellent video!! 👍🇨🇦

@dogsbyfire 3 месяца назад

Nice video. Thank you!

@lacyfurmage8846 3 года назад

My Belva amp is drawing A LITTLE power when key is off, THE REMOTE WIRE From Pioneer Stereo IS CONNECTED RIGHT. When the key is off, the little green light on the amp and the remote bass control knob both shut down. I got 3 cars with amp/sub kits I installed, I seen one site that said that drain is common with some low budget crap. It's not sucking major juice, just a little when it should not be using any power at all when it's shut down.

@dwaynemcallister7231 Год назад

A few years ago that something was draining the battery on the wifes Honda Odyssey, it was a relay for the A/C causing the drain...$10 fix

@williamcrazylacyfurmage9953 3 года назад

My Belva amp is drawing A LITTLE power when key is off, THE REMOTE WIRE From Pioneer Stereo IS CONNECTED RIGHT. When the key is off, the little green light on the amp and the remote bass control knob both shut down. I got 3 cars with amp/sub kits I installed, I seen one site that said that drain is common with some low budget crap. It's not draining major power, . just a little when it should not be using any power at all when it's shut down. when I first put tester on it starts at 0.05 then drops to 0.01 after like 3-4 seconds. It does that every time I do the test.

@lightning9279 4 года назад

Years ago Autozone tested my battery and alternator. They concluded both were bad. Sounded fishy. So I went to a mechanic friend. Only the battery was bad. That was 15 years ago. Haven't been back to Autozone since.

@electronicsNmore 4 года назад

Usually the testing they do is reliable, but they can screw up like anyone else. :-) Thanks for watching! Please share.

@Nickvec 4 года назад

@Light Ning Back in 1996, Sears told me my wife's alternator was bad on her '94 Ford Probe. (They apparently didn't notice that we had a gauge showing the alternator was charging fine). Still have the Probe and I'm still waiting for the alternator to fail ;-). Later Sears was caught selling mis-labeled batteries!!!

@retroelectro1190 6 месяцев назад

Definately get an amperage clamp reader and/or an old-school battery tester (the kind with an analog meter and a spring load via push-button - (looks like a cheese-grater)).

@mmichaeldonavon 2 года назад

Excellent video - dead on the money.

@rahulbhogal1336 2 года назад

thank you for this! found my parasite!

@electronicsNmore 2 года назад

Glad I could help!

@Blazeww Год назад

If you tried everything. If you have a blown roof light that has a button. It might be left on and draining power even tho it's blown out... I just happened to look up and see the button for mine in the on position and was like... Eureka! Seems stupid that it drains power as it doesn't even work. Seems stranger that it drains more power in 15 to 30 minutes than charging my phone for a couple hours does.... 🤔 Now we know.

@markt9438 2 года назад

I would recommend the diode alternator test first ,easy to do !

@mptrader1620 2 года назад

How? Any good videos or explanation on this.

@markt9438 2 года назад

@@mptrader1620 yes it's available very simply Good

@mptrader1620 2 года назад

@@markt9438 Do you have a particular one you can point me to?

@markt9438 2 года назад

@@mptrader1620 there are at least three that I saw on RU-vid just type in check alternator parasite

@mptrader1620 2 года назад

@@markt9438 Thanks

@Manuqtix.Manuqtix 2 года назад

Yeah it happens and if you don’t have a jump starter it’s a problem

@trumptubemedianetwork1863 2 года назад

Outstanding video ! Thank you

@moodberry 2 года назад

Fantastic! Great video.

@electronicsNmore 2 года назад

Glad you enjoyed it!

@156tempra 4 года назад

Wow, superb.

@electronicsNmore 4 года назад

Glad you liked it! Thanks for watching

@AThreeDogNight 4 года назад

Nice video buddy, I'd done forgot about this one.

@electronicsNmore 4 года назад

Thank you!

@steveb1542 5 месяцев назад

How do you perform the terminal test with GM side posts?

@Believe30 2 года назад

What is ECM and how can you tell which fuse is for the stereo?

@johnpuckett1211 9 месяцев назад

Great video! Great content. Great presentation. No added bs like the family dog or something equally stupid that has nothing to do with what the video is about.

@electronicsNmore 9 месяцев назад

Glad you enjoyed the video and found it helpful! Be sure to check out my wide range of video playlists and share my channel with others. Thank you

@andytipping70 3 года назад

A far simpler way to do this without disconnecting anything would be to put your multimeter - in millivolt range, from the negative terminal to the car body. nothing to disconnect and no chance of frying your meter