How to Test a Car Battery With a Multimeter ( Voltage + Cold Cranking Amps)

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bad battery or bad alternator how to tell the difference ? how to tell if a car battery is bad or dying ?
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This video has 2 parts, in pat 1, we look at
How to test a car battery with a multimeter
How to test a car battery using a hydrometer
How to load test a car battery using load tester
How to test a battery with an obd2 scan tool
How to test cold cranking amps
Car battery maintenance tips
A car that cranks but doesn't start or no crank no start situation
in part 2 i'll show guys how to test an alternator and how to tell if your alternator is bad. The main sign of a bad alternator is that the battery light will come on when the car is running. Bad battery vs bad alternator - I've seen many people fail to determine the difference between a bad battery and a bad alternator. So without guessing, here's how to properly test which one is bad. analyse the symptoms first is the best way to diagnose
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How to replace an alternator
• How to Replace an Alte...
How to find a short in a modern car fast and easy
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How to use a multimeter for beginners
• How to Use a MULTIMETE...
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16 июл 2024

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Комментарии : 167

@snaproll94e 6 лет назад

Finally, someone demonstrates how to measure voltage drop across connections. One of the best ways to pinpoint a problem. Nice job.

@hosslife645 8 месяцев назад

One of the the best "How TO" videos I came across. Thank you!

@rastai1 2 года назад

thank you...this is the most informative video on battery testing i have seen in the HOURS of looking I've done for an answer to how you can check the CCA of a battery with plenty of voltage. great job keep it up please :-)

@ayelleefun2620 4 года назад

Thank you for sharing this information with us, its great to see that there people who try to help others.

@bmw-e30 6 лет назад

A weak battery can also overheat an alternator over time as it struggles to keep it charged and you end up having to buy an alternator as well. I would replace a weakened battery immediately.

@casanovaevren 4 года назад

Great presentation .my cheap voltmeter showed 12.6 and did not go below 10 volts when cranking but the car did not start .i took the battery to autozone and it was bad! Good multimeter is the best investment

@brianhan5055 5 лет назад

Thanks man! You are the legend! 👍👍👍

@monty00701 Год назад

Great video! Your instructions are simple and clear. Thanks!

@josemedeiros007 2 месяца назад

Great video and information, my only suggestion is you should make sure you fully charged your battery before doing a CCA load test. My electronics teacher in high school in the 1980's taught us to use baking soda and water in a jar and soak the battery terminal in it for a few minutes to remove the corrosion before cleaning the terminal with a battery terminal wire brush, and he also said Vaseline Petroleum Jelly can be used to cat the terminals and help prevent corrosion, I have used it for decades, and never have corrosion issue's. I also use a Pulse Tech battery desulfator / Maintainer on my battery to reduce battery cell sulfation, the claim the patented frequency can desulfate batteries, and is used by the U.S Military on their vehicles.

@adoniscastellanos6914 Год назад

Thank you for all the detail info you give straight to the problem🎉

@GoogleModerator 4 года назад

Thank you for making this content - I'm grateful for the knowledge you shared.

@allanegan6502 2 года назад

101>909 Car Battery testing Comments say it all......Gold Standard, best on Net, content & communication

@hoosenkhan8553 6 лет назад

Your videos are very well laid out very informative this coming from a professional technical trainer well done keep up the good work 👌🏼

@palleh7742 6 лет назад

Very good battery info!

@karldumeury9775 3 года назад

keep it up.Thank u for sharing lots of important tips like Multimeter latency , good working terminal etc

@andrewpolzin8489 11 месяцев назад

Your videos are the best. Simply awesome.

@laneburgess1643 6 лет назад

You make great videos. Thanks for sharing.

@JunkyDIYguy 6 лет назад

you're welcome

@Animal_lives_matter Год назад

Good very thorough video. And we should disconnect negative first and vice versa

@Luminous_Beings_are_we 5 лет назад

Excellent video!

@josh3326 3 года назад

Very informative video. Very easy to understand.

@ShakespeareCafe 3 года назад

Best video on car batteries Thanks

@lodhiautos9761 6 лет назад

Great video. Thanks

@drivingparadox 3 года назад

Fantastic and so easy to follow

@coolissimo69 Год назад

Great video mate

@eddonald3501 2 года назад

Fantastic, informative video. Thanks

@navdeepsingh9593 4 года назад

Very well explained...useful information👍🏻

@glennvandaele7998 6 месяцев назад

Very insightful video, thank you.

@TheRicardo7500 6 месяцев назад

Amazing video, thanks!!

@james10739 Год назад

Good video I liked the details of like if you get 1 click then nothing it's probably a connection and the voltage drop at the terminals

@jollyroger2858 Год назад

Fantastic video, well done

@elektrojen7347 4 года назад

Very good and profesional . Thanks!👏👏👏

@CollosalTrollge 4 месяца назад

Great video, thanks man

@JulioOrtiz-ub3yo Год назад

I love dhis channel help me a lot

@alexinanalogue2645 2 года назад

Top video, well done.

@user-ju9sn5do7u 4 года назад

thanks alot you were helpfull

@paramedic4408 2 года назад

Great video! If you just installed a bnew battery (1 or 2 days old), what should its readings (range) in the voltmeter be normally?

@michaelserrano7097 5 лет назад

Thanks!

@ukgardener973 5 месяцев назад

Fantastic video I’ve certainly learnt a lot. Thank you so much for sharing your video one question I do have when you’re testing the cold cranking amps do you have to start the engine? Thanks

@flightofthefatman 2 месяца назад

You're awesome bro! 😎👍

@ryanybos 5 лет назад

Great Video thanks

@JunkyDIYguy 5 лет назад

thanks man

@egeayvala1799 Год назад

you deserve move views my firend !

@user-gr8rj6bm3u 4 года назад

Great insight. Very informative mate! Cheers!

@boltonky 3 года назад

Nice sort and to the point video :) , i am at the point of buying a CCA tester i just seem to have bad luck with batteries. Although i have found that things like SCA and similar generic batteries seem to not last as long as big name batteries like Century or Excide or will die quickly if you are pulling a high draw on start-up in utes etc. What really gets me is places that want to keep your battery to charge and re-test, even when just failed the test's...should be like other things just replace it and sorry but its up-to the business to deal with battery company not you

@dayantyrehouse9782 5 лет назад

Thank you..

@MIKEYSREVIEWS 3 года назад

Such great videos to bad he hasn't posted for some time.

@pollydor07 5 лет назад

THANKS

@divscuba7096 4 года назад

hello i have the same meter as you the 87V but when i try and use the min/max function when measuring the DC voltage it just overloads..... any ideas?

@thush8574 4 года назад

Thank you buddy

@wingkinwong9082 Год назад

Good video.

@nicklindhorst9708 3 года назад

Great vid wow

@tombaillie9967 2 года назад

Many thanks

@fa6151 2 года назад

Thank you

@Ironbuket 4 года назад

Thanks for making this video. Must have taken you ages. Who else is here from covid-19 lockdown wondering how your car batttery will fair standing unused for long periods?

@ThePedrofmf Год назад

Thank you for the great video. I have installed a new stereo and now my car cranks a lot before starting. I am assuming I must buy a battery with higher CCA. But I don't know how many amps. How can I discover this new value?

@frankmontez6853 4 года назад

I set commercial electric analog multimeter to 50 to test 12 V car battery and it read a lil over 10 close to 12 . Is that right ? I've also a slow charger at 1.5 amp slow charge . I cranked it soo much yesterday trying to get car started but nada . I had it towed . How long will this take ? I want to be able to crank car engine to work / test on car today

@kenberendt6578 5 лет назад

Why not have a Fluke 86 or 88? Just wondering... great video!

@michalt1495 3 года назад

what is the name of obd2 self - diagnostics to mobile phone ? Thank you 🙂

@pseudonym3690 8 месяцев назад

Really informative video, but you didn't really measure the cold cranking amps

@roncooke2188 3 года назад

hi great video. how is my best way to load test a 36 volts lithium battery 10.4 ah

@truleyblessed7406 Год назад

Thx

@bg307 3 года назад

Does it matter where the red and black lead are connected on multimeter?because I've seen the black connected to COMMON

@johnconyers9406 2 года назад

Thanks for the info, but I noticed a problem at 1:46 in the video. Is it just me, or isnt the voltmeter hooked up incorrectly? You have the positive and negative terminals on the voltmeter reversed, which is why the reading is negative 12 v. Even though Australia drives on the left side of the road, I think red is still positive for you guys, right? LOL. But seriously, thanks for the info and your time in creating this.

@g0fvt 2 месяца назад

You are right, he has the leads reversed at the meter.

@marcoforte298 4 года назад

Bravo ! Excellent explication. Thanks

@rafikmajam268 3 года назад

Thank You for such a great informitive video

@ronin18D 6 лет назад

Your videos are very informative, but please do something about the music. It's a iit too loud making it difficult to hear and understand you.

@JunkyDIYguy 5 лет назад

New videos doesn't have any music now

@lauriemartin2693 2 года назад

How fo i check my 2000 Pontiac_ sunfire srlrctroc window motor is eorkin

@marwanak10 2 года назад

So my battery reads 12.66DC but sometimes struggles to turn on. It's a 2006 camry. Could it be the switch?

@iordache3278 2 года назад

before to top up with distilled water must mesure acid density, it is a must,you can refill with acid 1.28 maximum density.

@davecurry8300 3 года назад

Battery made in Australia, can't get any better than that, but then I'm an Aussie !!

@taiwosunkanmi5391 3 года назад

Cool

@rocktekmetalworker 4 года назад

small DVM leads are reversed on meter end showing readings as negative....

@ya_boi_zak5927 Год назад

Nice. My battery reads 12.85 volts with the engine off. With the engine running it reads 13.80. These are good numbers to have.

@andisadler2897 4 года назад

We on lockdown and im going through this at present. Car battery is dead! wont even unlock the car. Battery is only 2 years old. I dont have a charger so will have to source one first.

@RussellBooth1977 5 лет назад

I've had the same battery since new & its charge was 12.42 volts when I bought it new in 2016,its gravity has always been in the fair range (white) since brand new,its CCA rating is 420. AFAIK when the battery gravity is down in the red area,it either needs to be recharged or possibly replaced. I did this test to GM specifications which is at about 70°F (21°C) temperature with a fully charged battery :- 1. Disable the fuel & ignition systems 2. Connect the multimeter terminals to the battery terminals. 3. Operate the starter motor for no longer than 15 seconds 4. Observe the voltage which shouldn't reach below 9.6 volts,mine didn't reach below 10.3 volts during the time that I was cranking the engine over,so it must be o.k. I did try the minimum voltage setting on my multimeter & it got down to 9.2 volts when starting the engine but that was with a 12.26 voltage (half charged), apparently between the 9-10 volt range indicates that the battery is still o.k.

@kevinellison6962 4 года назад

funny I'm in New Zealand and recharging a battery from my fathers mobile home , that I imported from Australia the address Cobolt st Carole Park is exactly the same as the one I have , hahahaha.

@blackopal3138 4 года назад

Where do you live!? Can you be my new mechanic? lol

@markkalsbeek5883 5 лет назад

Do not use baking soda to neutralise an acid burn! This may exacerbate the injury! Just run under plenty water to dilute.

@mohamedabdelaziz9971 5 лет назад

Turn the lights for at least 30 sec. Close it before measuring ?? Or leave it on while measuring ??

@delsingh5897 5 лет назад

Close the lights

@shrimpbynightbythomas8212 2 года назад

How many amps does a battery have when it says 710CCA?

@JohnPooley-te9ei 3 месяца назад

Nice1..Junky & thank u

@sgv2753 3 года назад

Like !

@Grahams-Grass 3 года назад

👍👍👍👍

@DRJMF1 3 года назад

What is the minimum acceptable cranking voltage ? Eg if voltage drops from 12.4 to 10.18 v during cranking, then does this mean the battery is weak. My battery is 5 years old, so I guess 10.18v cranking voltage means it needs replacing ? It’s a 2 litre diesel Toyota. Thanks.

@404notfound..... 2 года назад

If it drops below 9.6 V when cranking, the battery has to be replaced.

@unityforall-md4fl 8 дней назад

@@404notfound.....He showed the more expensive electric voltmeter shows micro secdrop of voltage around 8,that needs replacement. But later the OBD II blue driver live data shows crank voltage above 9.6V. The other better tester shows crank voltage below required in Watts. I guess,safer to just replace the battery😂

@whyday9078 Год назад

can u make a video u saying battery like 1000 time.

@websurfer1585 4 года назад

I thought battery had to stay above 10v during cranking?

@selwyn13 2 года назад

Can't the clicking also mean the starter is starting to go bad?

@404notfound..... 2 года назад

Yup!

@sarasmith7524 5 лет назад

Some aspects of this video are very accurate but he's way off the mark in others. He's calling his tester a load tester, but this is just a simple resistance based tester and these are very inaccurate, mostly labeling bad batteries as good. A true load tester is going to be large because of the carbon pile load bank located inside and will have an adjustable load for various CCA ratings on various batteries. His battery charger looks like a jump box, not sure about that one. Also, you can not use the starter for testing the battery because a bad starter will begin to pull excessive amperage which would give you the same symptoms. The best thing to do is look at the voltage and age of the battery. If you know you didn't leave anything on in your vehicle that would have drained the battery, your voltage is under 12.6V, your terminals are clean and connections good, and your battery is more than 3yrs old, 99% of the time it's going to be a battery. Always go to an automotive electrical shop if possible for battery/starter/alternator testing as places like Autozone and Pep Boys are clueless and even many regular mechanics shops do not know how to properly check these things, especially the more complex systems on newer vehicles.

@kenberendt6578 5 лет назад

😊

@5eddyr21 4 года назад

I took my battery to autozone and they said it was hood because it was reading 12.4volts. But they don't know about crank amps and how they work. My battery was reading good but not enough under load to start the car.

@vannquishgaming883 2 года назад

What if the battery reads -12.40

@thecelticgiraffe 5 лет назад

It seemed like it would be a good video but hard to understand and too fast. Thanks for doing it though!

@richrossi5646 5 лет назад

I agree. Talk SLOWER and we all can understand better. Thank you

@lazyman2451 4 года назад

That why there a turn on subtitles feature

@DECKARD263354BR 2 года назад

Great video mate , i measured 12.4v overnight, and after 3 days 12.2v , starts fine. Running voltage is between 14.2 - 14.v. Is this normal for a battery? Battery was replaced in August 21 , with a larger 480cca. Cheers.

@SimplifiedTruth Год назад

Mine is doing the same. How did your battery hold up?

@DECKARD263354BR Год назад

@SimplifiedTruth I ended up buying a CTEK charger and used a recon mode and it has made a massive improvement on battery life, starts are great 👍

@SimplifiedTruth Год назад

@@DECKARD263354BR Awesome. Recon mode? That's a mode of the charger Or vehicle?

@DECKARD263354BR Год назад

@SimplifiedTruth It is a reconditioning cycle, because one day I left my map light on and it drianed the battery, it never got to full voltage until i bought the charger and charged it full cycle, brought it up back to voltage like new. Such great chargers the CTEK, some prestige car manufacturers provide them with the cars purchase 👍

@steso8979 3 года назад

Issue is with the car running the battery voltage jumps around wildly from 14v to 9v to 2V to 12V etc.. while running idle. any guesses?

@Izzyfoshizzy710 2 года назад

Weak connections

@steso8979 2 года назад

@@Izzyfoshizzy710 thx for input, but no. battery died when it got colder outside! 6 year old one :D

@ferminjrantalan1692 3 года назад

Not sure

@15DurangoRT 9 месяцев назад

What's up with the hand animation?

@brandonflorida1092 7 месяцев назад

How am I supposed to see what the voltmeter shows while I'm turning the key? The voltmeter will be under the hood and not visible to me.

@Springfield1225 3 месяца назад

Two man operation.

@RBLXGamingVids 2 года назад

I got 7.90 v while cranking thats way to low but battery is 25% and it did not even start

@7071t6 Год назад

wow so much to buy, yet better off just checking the volts with cheap multi meter and make sure its a sealed battery, with green or view window to show the condition of the battery, forget the rest, but also if the car does not start and the battery is good, then sometime disconnecting the battery and depressing the brake ,will re set the computer and any excess charge in the cars electrical system?

@lauriemartin2693 2 года назад

How to tell if door's power window motor still works

@JunkyDIYguy 2 года назад

check the fuse and relay for window motor, if they're good then you can remove the door panel and unplug the connector for window motor. use a test light to see if you getiing power to the motor when as press the switch. manually supply power to the motor as well to if it works

@Moymoy-25 4 года назад

battery tester aren't that expensive and it's more accurate than Multimeter

@heathermoore2654 4 года назад

When I start my car it's a slow crank? Is it my battery or alternator or my starter is going bad I'm trying to figure it out

@JunkyDIYguy 4 года назад

sounds like a weak battery, take you car to an auto parts store and have them do a battery and an alternator health check for free,

@Joeelectronicschematicsforauto 3 года назад

It can also be the alternator is bad if you crank the car a lot then your battery will be drained number one number two if your alternator is going bad it will not charge the battery so it will look like your battery is bad but it's the alternator number three it depends if the battery is top post or side post so you can measure the voltage drop across the terminals