How to Test an Alternator

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Diagnosing Alternator Problems. Learn how to test an alternator with a Multimeter. Does your car not start, do you have dim headlights or interior lights, does the starter sound weak when start the engine, or does your car die sitting overnight? This video will show you a few ways to test your alternator to see if it is bad, is going bad or is good. A good alternator will show a charge at around 14.2-14.7v while the car is running and under an electrical load it wont drop below 13v.
Here is a great multimeter for under $20: amzn.to/3sy10xH
Test your Battery: • How to Test a Car Batt...
Check for Parasitic Draw: • How to Find a Short in...
Top 10 Mistakes Car Owners Make: • Top 10 Mistakes Car Ow...
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Disclaimer:
Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not ChrisFix.

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13 май 2014

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Комментарии : 4,7 тыс.

@jumpercable20 4 года назад

Hey Chris, I'm a retired auto mechanic, with 4 years experience at General Motors Assy Division, (Back from 1978--1981), then 15 years as ASE cert master at a Chevrolet Dealer, then 4 years at an automotive mechanical claims facility (Call center for under 800.00 repairs). I have to thank and congratulate you for the outstanding job you're doing. You are helping people and asking nothing in return but for people to subscribe to your channel. You are helping thousands of people from being fleeced by the people that take advantage of people that don't know anything about the automobile or the industry that's giving them a bad name due to greed and corruption. My guess is the thumbs down people are the ones losing money thanks to your RU-vid help. I just want to thank you and salute your help to people that are tired of being screwed by the shops and mechanics that are more concerned with making money than keeping customers happy.

@frankramirez86 3 года назад

Jumpercable wireless sir you are so right...love you comment

@sasusan1 3 года назад

I simply don't understand how you get any thumbs down on your videos. Unbelievable; the nature of man. Thanks Chris for your exceptional videos.

@denoall 3 года назад

Frank Ramirez i need those 😭

@georgedavis2634 3 года назад

If u have an ase and all this experience why are u hear

@SwayNotZay 3 года назад

@@georgedavis2634 hear

@TDMack12 4 года назад

Finally, someone that do an instructional video that's to the point and no rambling about irrelevant matters unrelated to what the viewers are seeking. Chris you are the textbook example of how videos for DIY's should be done. Thank you much.

@tigerlily8504 8 месяцев назад

EXACTLY!!!

@turkishexpress 7 месяцев назад

Agreed!

@israelvibrations100 7 месяцев назад

Agreed 100,000%!

@sincereoneson 2 месяца назад

I definitely agree.🎉🎉🎉❤

@reneecollins462 2 года назад

You are my hero. Since I lost my husband I've had to figure out how to do a lot of things on my own. The information you provide is detailed and specific and clear and anytime I watch one of your videos I come away with confidence that I have learned what I need to know from you. I appreciate so much everything you post because even if it doesn't apply to me today at some point I'm sure I'll need the information and the information you provide is so good thank you so very much for everything you do.

@thenightporter Год назад

Renee, your post made me tear up. I am sad to hear that you lost your husband. I commend and admire you for having the strength to help yourself. I sense that you are a kind lady. I am on my own too and it is tough when we have to do everything ourselves. It IS kind of fun though when someone at work will talk about a car issue and we can pipe it, "have you checked ______?" and share the wisdom we learned from Chris (only we don't cite him). Even the men at work look at me and ask, "how do you know that?!" I fib and say, "I know some mechanics. I watched. I learned. I fixed some cars." 😆

@demetriusjackson472 Год назад

@@thenightporter !0

@mattthambirajahpt286 Год назад

100% - This channel has saved me thousands.....

@solarsolari6705 Год назад

RIP, to your husbands ladies, but you have to move on and get married again......

@audreyrose7450 Год назад

@@solarsolari6705tf are you even talking about

@columbia1991 Год назад

I really enjoy your tips and this one saved me a ton! Our 6 year old Lexus had trouble starting so I took it to Lexus. They said I needed a new battery ($400) and a new alternator ($600). They charged me $120 to diagnose! I guess I should have just gone to an auto store! Looking at the battery I noticed it was the original and there was a label indicating an 84 month warranty. I asked the service advisor and then he told me that I was eligible for a 25% proration off a new battery so it would be “only” $300 but he highly recommend terminal cleaning and protection for an additional $25. I was pissed so I paid the $120 diagnostic fee and drove it home. I went to Costco and bought a larger AGM battery (27F vs 24F) and it fits perfect. I then followed your steps and discovered that the alternator is fine. I could kick myself for taking it to the dealer for diagnostics but I didn’t know how to check the alternator until later. Thanks and keep up the great work!

@leevww Год назад

Dealers and auto mechanics in general are liars and thieves.. Find an honest one, they are out their ,few and far between but you can find one... , then stick with them. The rest let them Rot,, this industry is about the worse their is..Having bought and sold and repaired dozens if not 100s of cars over my lifetime,,this is what I've found to be true...

@poison2285 3 месяца назад

Dealership techs will do anything to get those extra hours.

@ricardosegoviajr5307 5 лет назад

Outstanding video. Shady mechanic told me I had a bad alternator. Ran these test and it was within the mentioned volt range. All that was needed was to clean connector to alternator. You saved me $350. THANK YOU!!!!

@chrisfix 5 лет назад

Glad the video was helpful!

@tnamen1307 5 лет назад

@@chrisfix My car has parasitic current draw of .02 amps under 12.6 volt 45ah battery. What would be the voltage of the car after sitting straight unused for 48 hour????

@Apocolis64 5 лет назад

@@tnamen1307 There are acceptable current draws in newer vehicles. New car manufacturers say that 30-50mA (can be upwards of 80mA for trucks with a lot of accessories)is acceptable. Anything higher than I'd worry about it. Clocks and computers to some degree stay on even when in sleep mode so you'll always have draw.

@Apocolis64 5 лет назад

Realistically .5V and below is acceptable loss throughout a vehicles entire circuit. Anything more than 1/2 a volt and I'd then worry about finding where the voltage is going.

@tnamen1307 5 лет назад

@@Apocolis64 the voltage drops to 12.40 from 12.60 in just 2 days. Is this ok??

@bibo3373 6 лет назад

Man, Life would have been easier 50 years ago if we had the internet. Life is getting better in a lot of ways. Not all though. Thanks, and you deserve your subscription and view numbers.

@chrisfix 6 лет назад

Thanks! The goal it to help people!!!

@zazarays 3 года назад

@@hoobered1232 No denying everything takes longer that way

@mrrice3443 3 года назад

@@hoobered1232 Right on ! And you didnt h have to worry about misinformation or lies .

@mrrice3443 3 года назад

@David McKee Yes I have to admit I have learned more about more things since the web just because of the speed of acquiring info . I wish we had RU-vid back when I was learning the guitar . I used to taperecord song off of the radio and slow them down by wedging something into the tapedeck and play them over and over 100s of times to learn a song or find a tablature in guitar mag . Now you can find a lesson on just that song maybe even by the original artist . Learn the song in 30 - 45 min

@dvader3000 3 года назад

@David McKee oh wow. You must be lazy,reading books is a bad thing for you?

@MikeBrown-ii3pt Год назад

It's been a while since I've had to test an alternator so I needed a "refresher course". I'm glad to have found this simple, too the point video that told me everything I needed to know. It helped me figure out that my brothers car didn't need an alternator but just a new battery. We had several days of sub-zero temps last week and his battery gave up. Now, if I can only get him to reimburse me for the price of the new battery lol!

@davehawkins403 Год назад

Chris, you are a ROCKSTAR! Thank you for helping me fix pretty much every issue I have had with my vehicles. You’ve helped me save $1000’s of dollars doing it myself! Thanks man!

@johnbox1135 5 лет назад

Just saved me $150! Cleaned connection to alternator and now it is working like new!

@skyrat174 4 года назад

Lol!

@CatalystSM 4 года назад

One of the best auto DIY videos I’ve watched. Easy to follow, explained well without over doing it. Extremely helpful- thanks.

@chrisfix 4 года назад

Thanks a lot!

@tobsternater 2 года назад

Yes....your videos are so well explained and factual. No issues with being the look at me guy while you're shooting. Very appreciated!

@anitamackeigan108 2 года назад

Finally, someone who speak plain simple language and doesn't ramble on or try to sell something!! Thank you!!

@tempgar 3 года назад

Thanks for an elegant, good, informative, clear, uncluttered video. I didn't have to sift through bad comedy or bad music or other gimmicks but just got what I needed. Well done and thanks again.

@JamieDelour 7 лет назад

Chris, you're doing a great service for people far and wide! Thank you

@chrisfix 7 лет назад

I am glad the videos are helpful!!!

@jay-nh6et 7 лет назад

Chris, u said that the voltage should not drop below 13.0v with loads on, but then u go on and say it should not drop to 12.7v. So which one? thanks for all ur help, you're awesome.

@jamesleonard408 7 лет назад

Jamie Delour

@jimdavidson5208 7 лет назад

Shouldn't drop at all. Long as you have anough alternator to created the DC voltage and current. Also proper wire size and terminations. If your system drops below idle no load voltage, you have an issue. The entire vehicle and audio slash lighting systems are being under fed/performance.

@uplay64 7 лет назад

James Leonard 2012 Volkswagen Jetta s

@fongdeep3583 8 месяцев назад

Love your videos Chrisfix! I used this video to diagnose an alternator issue with my 2008 Civic. It's almost at 300000 kms and your detailed and thorough videos are a big part of helping it make it to that milestone!

@bigbenchrob 17 дней назад

Your video came up in a Google search for “how to test alternator”. You concisely provided exactly the information I needed to answer my question. Without all the crap. Sincerely, thank you!

@chrisfix 17 дней назад

I'm glad the video was helpful!

@Scyther7881 2 года назад

Can’t thank you enough. You helped me determine that my alternator was, in fact, bad but more importantly when it came time for me to replace it I paid extra close attention to the wires and bolts only to find that my negative terminal on the battery was rusty, the chassis ground was loose, AND the chassis ground wire was frayed. As soon as I replaced the alternator and negative terminal wiring my car started right up and it sounds better than ever. Thank you so much.

@debruin14 4 года назад

This video was awesome! Did the negative voltage drop test on the alternator. Found I had 0.8Vs of drop between the alternator housing and the battery! Pulled alternator and cleaned/sanded brackets and bolts and boom! Alternator putting out 14.4V instead of 13.8.. under load it was below 12.75V before cleaning. After cleaning it held over 14V with everything turned on. Great tips! Thanks Chris!

@chrisfix 4 года назад

Awesome! Thanks a lot Luke!

@w1ldthin9 2 года назад

what does removing and then cleaning the brackets do? provide for a better ground?

@lando8398 3 года назад

I was always told to disconnect the positive cable from the battery and if the car shut off, it was the alternator. I just checked everything like you described, and it turns out that it is the alternator not producing enough current. I'm still going to use your tips, especially after I install the new one. Thanks for your tips on properly diagnosing an alternator, I'm sure you've saved a lot of people a small fortune.

@martinbenson7652 11 месяцев назад

My wife's car battery was going flat after a week and knowing it wasn't that old I suspected the alternator. I was ready to buy a new one and just tried to find out how to test it first. So glad I came across your channel as the problem was a bad earth between the alternator and it's bracket. A little cleaning and the voltage drop went from .16 to .05 The car is charging fine so $$$ saved thanks to you. Cheers mate.

@kimwilmot693 Год назад

Terrific video. To the point with no useless commentary. Thank you so much for the great detail in what to do. 👍🏻

@randallposey4392 4 года назад

Thank you, young man. You really packed in a whole lot of information. Great job. A video cleaning the connections would be helpful. Not for me, but for those new DIY'S out there. A lot of money is wasted on buying alternators and batteries that are not needed. Happy New Year and have a blessed 2020.

@jameswalker1210 4 года назад

Fantastic video! Well filmed, diagnosed, instructed, & explained! Easy learning video, thank you Chris.

@marsoelflaco5722 3 года назад

Thanks for the straight to the point, no nonsense instructions and information. It came in handy! 👍🏽✌🏽

@cehuddl 3 года назад

Chris keep up the great videos. You teach me more about auto maintenance than anyone else on RU-vid.

@Gixx2000 4 года назад

This vid is excellent - I especially appreciated the voltage drop test reminder. Clear, concise, well done! I'm a subscriber 👍

@manuelp7912 3 года назад

Hi your video is really GREAT! The way you do this voltage drop tests make a lot of sense! I am a retired electric engineer, with more than 50 Years of experience and I never saw this very logic tests IN A CAR! Keep on going my friend!!!!

@lamusicamees424 6 месяцев назад

1989 Jeep YJ owner here. Thanks Chris for this very well explained video and giving me clear instructions on how to check all this and the reasons and logic in strange readings. Brilliant video. Thanks for reaching me how to figure these gremlins out and what to clean and replace. 100/100

@chrisfix 6 месяцев назад

Thanks a lot!

@dumpsterstu4474 3 года назад

New years day my Alternator went out on my Civic I needed a refresher course on testing it. Thanks for making this video.

@215.civicsi7 2 года назад

10th gen civic?

@SnackAttack77 6 лет назад

Thank you so much brother! The end of of your vid with the voltage drop test was what allowed me to find that I had a bad alternator from Rock Auto and nothing else!

@SotosMoud 6 лет назад

Thank you for all your helping vids man! I'm planning to fix an old audi a4 and am really struglling with the battery stuff. Your information and advice are a great helper, keep it up.

@craig4197 2 года назад

Well explained, and I love it when you say, "I'm good." Then move right along... very informative and efficient. I test wires in the field for a living, and I learned a few tricks to apply to cars. Great job, and you have a subscriber. You know your stuff.

@chrisgianoutsos4837 Год назад

Man, great vid! Going to test my alternator today, had no idea what to do. Your video made it very easy to understand, and love that you went through the whole series of checks for bad ground. Thank you sir!

@zombienation4788 4 года назад

Thanks Chris! I watched a few of your videos and there outstanding so i finally subscribed. keep up the great work!

@zahimiibrahim3602 6 лет назад

Thank you so much Chris, I have a problem with either my alternator or battery and tonight I'm going to find out which one it is using your excellent tutorial.

@silverbackanimal7215 4 месяца назад

Finally someone with the full check list , easy to understand for even my grandma

@Legacyyyyyyyyyyyyyy 2 года назад

used this video to diagnose a failed alternator in my wife's car and then replaced it. over the years you've saved me thousands. thanks chris

@kodyburlein3227 4 года назад

Thanks for the lesson bro ur a good visual teacher clear and speaker and decent camera guy. We need more youtuber with ur teaching abilities! Much Love, Dakota Burlein

@gtrust1779 3 года назад

This is the perfect pace and amount of detail for me to learn. Its very satisfying when you find a tuber tuned to your learning pace and style. Thanks for your work Chris

@tobsternater 2 года назад

Yes....great pace...explained in plain speak. Well done to you!

@thenightporter Год назад

I agree

@winfieldritzert2176 Год назад

Yes! Very important that tutorials aren't rushed or bogged down with too much info. This, as you said, was perfect...

@Labgorilla 3 года назад

Thank you Chris. Helped to confirm that my battery was low on juice and that my wife driving the car at night with full blast heating on short trips and our cold weather had resulted in a discharged battery. Alternator working fine. And battery charged again by running on idle for 10-15 minutes in daylight.

@chrisshari8367 Год назад

This is a great video showing how to test your own vehicle battery at home if you own a multimeter. The only part you may want to change is where you said that you can add bottled water to the serviceable batteries. I wouldn't recommend that. Use only distilled water for lead acid batteries. I am a former Service Manager for a tire & lube shop and a former Technician at a water bottling facility. Thank you for making it easier for the D.I.Y.'r! 👍👍

@emmanueldipom7183 4 года назад

Thank you. This is something that I needed my dad's car has a bad alternator and this is something that helps.

@Airvidal 5 лет назад

I just changed an alternator that was faulty. Thanks for your amazing video!!!

@BearClawJ Год назад

Damn this is a perfect, straight to the point video. Love it👍🏻

@rvscootin3457 Год назад

Great Video and Thanks!!! As a side note... You could also disconnect each wire, and use the Ohm (resistance) function on the meter to check for excessive resistance. This would cause the same voltage drop issue if there was excessive resistance.

@sevenstring777 5 лет назад

Thanks for the info! I appreciate you taking time to explain this.

@snowdome4113 3 года назад

Great video, hands down, explained very clearly. I just learned something new. A huge "THANK YOU" to you!

@christen1075 2 года назад

Very well done my friend. Used the same HF multimeter and indeed, well stated and your advice...spot on. Saved me a trip to AutoZone and right to the junkyard where I grabbed a $27 buck Delco Remy rebuilt and installed it in the '98 Chevy Truck...BAMM, 14.2 volts instead of multimeter being all over the place with the old one. No idea if it was the voltage regulator that was going, but since it's internal, makes no difference. One again, increased my knowledge of cars just a bit more. Thanks buddy!

@ChrisBaccus 2 года назад

Thanks for this. Had a battery and alternator checker and it was showing a high status for the alternator, so I ran your more detailed test. Nothing was wrong and everything checked out fine. Thanks for putting this together.

@bulldogboxingclub 4 года назад

Thank you for sharing this. This was a huge help. 👊🏼

@Endangeredgenius 4 года назад

As always, you do a very thorough job with explaining and disclaimers. I always go to your videos when I get stuck because I know you do the job correctly with proper facts and backed up information to support the tasks at hand. I recommend your channel to any and all. Thank you Chris!

@MrLESRAJ Год назад

40 yrs as an industrial electrician, learn the best advice from you, thank you.

@toddhansson1613 11 месяцев назад

Buying a multimeter as you suggested and testing my battery and alternator following your videos has given me peace of mind knowing I don’t need to spent (waste) $$$ having to replace either. Thank you

@okamorah8251 7 лет назад

This video can't be any clearer. Awesome and so glad he did not add any music in the background. Keep it up! I am going to create a spread sheet on the instruction, print it and have it handky to fill in my own results, to compare with.

@chrisfix 7 лет назад

Thanks a lot! Glad the video was helpful!

@richardcard2290 4 года назад

One of the best videos Ive seen, you’ve helped a lot of people including me, Top Man, Thank You.

@SeanKStephens Год назад

Excellent video quality, I really like that you don't ramble about nonsense, you presented a set of diagnostic steps that I could convert easily into notes. I haven't done this kind of work in 30 years. Economic circumstances brought me back to the car repair world for my own cars and this is going to save me a lot of heartache with modern expensive mechanics.

@TacoWrath95 Год назад

I noticed one day when starting my car up that it was suddenly very weak, and had developed an odd, high-pitched whirring noise. I thought it might have been because I forgot to turn off the air conditioner before shutting the car off, but then I also noticed the windows opened and closed much more slowly than they had before. Thanks to this video, I was able to diagnose the alternator as the issue, seeing the battery was no longer getting charged with a constant 12.6. Thank you for the video.

@petecolantonio45 7 лет назад

One of the best step by step how too's that I have found ... Thank you...

@josea.garcia3994 7 лет назад

Ok thank you for that info!!! I went ahead and put in a new alternator and now it's reading 14.6 volts on a machine they used at the Toyota dealership!!!! Thanks again✌✌

@dkeiepps5606 2 года назад

Just swapped out a battery that went dead for a new one and wasn’t sure how to know if my alternator was the issue to begin with. This helped a lot and straight to the point you’ve gained a new subscriber. Thanks.

@chrisfix 2 года назад

Glad the video was helpful!

@ericarroyo228 3 года назад

This is real good. I've known how to isolate alternator vs battery problems for years, and correctly, but these are some fine details and useful methods.

@WilliamDye-willdye 8 лет назад

Yesterday I replaced the alternator on my 1G DSM (a 1991 Mitsubishi Eclipse). This was a very big deal for me, because I don't know much about cars. Replacing an alternator was the most complicated auto repair task that I'd ever attempted, so I watched several RU-vid videos to help me understand what I was getting into. This video was one of the best, so thank you for posting it. The new alternator seems to be working great so far. I plan to check on it during the next few days, using sources such as this video as my guide. Thanks again.

@chrisfix 8 лет назад

+William Dye Awesome! That is great you were able to change the alternator! It isnt too bad and now you are ready to do more stuff! Glad the video was helpful!

@FeelFighters 5 лет назад

I know this is 3 years old. But I also have a 1g dsm, it's a 90 talon Tsi, but you're lucky that was your first car repair. Some alternators I've done, you need to remove the tire and get under the car because its towards the firewall. 1g dsm alternator is a piece of cake, I hope everything worked out and that old beast is still running. Cheers.

@terryyouth 7 лет назад

Easily done!! good job! Thanks

@EricT3769 5 месяцев назад

Wow. 9-year-old video, but still so relevant and very timely for me. Also saved me over $400 on a new alternator. I just had a bad battery. Thank you so much!

@vinny2474 3 года назад

years later and im still using this video for car problems. great video :)

@chunkyfather29 8 лет назад

wow, this video is exceptionally well made. That's a milli for making it

@pwanlass 4 года назад

Thank you so much! This video saved me so much time and money on my wife's car.

@lalamorena22 3 года назад

Just did this test today on my 07 Jeep and image passed the test!! Thanks Chris! You are freaking awesome!! I went for an oil change and was told I NEEED to replace the alternator within a few days!! I decided to take matters into my own hands!

@ulysesj-a9659 2 года назад

So what was the problem u fixed

@joshuamclane6363 2 года назад

Even with all my years of experience working on cars. chris your videos are the best on the internet to teach people. Great work keep it up thanks.

@paulcostelow7713 3 года назад

Chris, Your videos have made me a better mechanic, I've learned a lot from the many videos you've made. Thank you very much!!! Paul

@jllewislewis5210 2 года назад

There is the old school to check if alternator is bad or not,,, donbt need multimer or wahtever..KKE'

@raez777 7 лет назад

Thanks Chris your doing a great job man appreciate your videos

@PaulClifford Год назад

I know this is an older video (and it bums me when people comment on my older videos like they're brand new, not that my 10k subs is anything like Chris's), but THX. I know if you've done a video on something, I can trust the info. My 99 Camaro was parked for like 11 days and when I went to start it, it was dead, so I jumped it and thought nothing of it, knowing I do have a light that stays on a little too long...and then it wouldn't start again when I was gonna go to the gym yesterday. This video helped me figure out that it was the alternator and not the battery, so one online order, 20-30 minutes of work later and I can now tell that my suspicions about the alternator being bad were correct. I work from home, so it was great to do this faster than a mechanic could b/c there weren't other cars in line ahead of me and I didn't need to take it elsewhere. Thx again Chris.

@riom6768 Год назад

Best channel on RU-vid. You've helped me so much fixing my own car and family members cars. Thank you so much. No more having to take my car to a crooked mechanic. Can't trust anyone these days.

@srocks2003 4 года назад

Can't say "Thank you" enough for your videos! I replaced my battery, but have 12v when the car, no accessories turned on. Will follow the alternator testing tomorrow.

@chrisfix 4 года назад

I'm glad the videos are helpful!

@Straightlurkn 3 года назад

A 6 year old tutorial definitely helped me today! Thanks a lot Chris!

@corninyourpoop8707 2 года назад

I can't thank you enough! I just bought a car and the dealer said he just replaced the battery. After a few weeks, my cars power seemed low. With the alternator running the battery was at 12.3v, yikes! I found your video did the test and had about 1.4v voltage drop from the alternator case to the negative battery post. I ran a new ground from the harness that connects to the battery to a bolt on the frame and voila! 13.8v. I believe after the battery charges a bit the car will be over 14v. Oh and I checked all of the other spots you recommended and they were within spec.

@jblowers62 3 года назад

Thanks for the great lesson on diagnosing your batteries voltage and troubleshooting the whole process! Very helpful

@juliopereiramartins2841 5 лет назад

Thanks, Chris, it's really helpful.

@jojoalbite9820 5 лет назад

Very helpful Chris Fix...keep more helpful videos like this...

@charlesmcgehee3227 9 месяцев назад

Chris you are very skilled. Your ability to teach even a person with no real experience. Thanks bud.

@johnryan9626 2 года назад

Chris, you are great with your videos. You are Always spot on when it comes to a fix. Thanks

@chrisfix 9 лет назад

+shane Blandford-scherr, I cannot reply to your comment for some reason but I hope you see this. If it only shows 11v then it can be a bad alternator, connection, or voltage regulator. Did you do the voltage-drop test I showed at the end of this video? That will let you know if the connection is bad. I think you just need a new alternator. The car is old and 170k miles is a lot of miles.

@shaneblandford-scherr3375 9 лет назад

Thank you, I will do the voltage drop test, and if it fails that I'm pretty sure I'll end up scrapping it, clutch is completely shot anyways thanks again, great videos btw will subscribe

@layuptech 8 лет назад

hey Chris finally ran that wire have had it for a while now just procrastinating but still no dice there is no fluctuation in voltage when reving the engine .My un trained mind instantly thinks bad alternator could autozone have lied to me two times on separate occasions in different cities tuff one to believe what I did discover is that there is some resistance at the terminals from alternator to battery to fuse box but but it seemed like the outer surface there is continuity so if you have anything that comes to mind really would appreciate it

@haroldwilliams4722 7 лет назад

ChrisFix

@TEBCO123 6 лет назад

ChrisFix Nice video

@jman4573 6 лет назад

Hey Chris I’m having issues with my 04 Silverado my battery not charging message popped up and I check voltage and it will decline into 11.5 as I drive once I turn car on though battery goes back up to 12.4. I don’t know what my problem could be truck turns on every time

@GeeQ67 5 лет назад

Thank you for taking the time and uploading this video. We appreciate it.

@chrisfix 5 лет назад

Glad the video was helpful!

@marwray1 Год назад

Thanks Chris. You’re an honest decent citizen. That likes to help fellow citizens. Keep well and stay safe fella. All the best. From Wales U.K. 👍🏻✌🏻🏴󠁧󠁢󠁷󠁬󠁳󠁿🇺🇸🇬🇧🍷

@mongtoph3527 24 дня назад

Bros video just saved me a battery and a alternator THANK YOU SIR

@mandyjoi7015 5 лет назад

Thank YOU!!! This is so helpful and a bonus that we have the same truck. You rock Chris😃😃😎

@chrisfix 5 лет назад

Glad the video was helpful!

@blcdad 2 года назад

Explained great like in all of your videos! I would also suggest checking the connection of the actual battery terminal to the clamp itself and the battery cable where it connects to the clamp. That's where probably 90+% of the problems lie. Be careful with probing the alternator output with the probe! Touching the alternator output and the alternator case ground or any other ground will make a big spark! It could also damage the alternator!

@daves.9479 3 года назад

A dirt-cheap Harbor Freight multimeter! My kinda guy. Excellent vid, thanks.

@chrishultman9333 2 года назад

Great video. Simple, clear, to the point. Thank you.

@SadeceENler 4 года назад

Thanks Chris ! Thanks to you i have repaired a lot in my car and friends car also even started to make some extra money :) Trying to get better via your videos and who knows maybe soon will start running my own car repair shop ! Thx dude and you deserve each follower ! Cheers !

@chrisfix 4 года назад

That's what I love to hear! Thanks a lot!

@filcandiy 4 года назад

Thank you so much, i learned something more

@themaker8791 Год назад

This video saved me a couple hundred bucks just today. Had an issue where the battery gauge on the instrument cluster would be at 14 while driving then dip down to ~12 for a moment or two then bottom out like it was dead. Has happened intermittently over the last 2 weeks. Wasn't running rough or anything so drove it home. Sitting in park with it running, was sitting at 11.6v, understandable given that I had just driven it ~30 miles with no charge going on. Was just about to submit the order for a new alternator when I decided to test it out. Went through with this video and found that the battery-to-chassis connection had a bunch of rust on it (it's a 1999 Cherokee XJ, rust comes standard). Took a wire brush to every connection and then replaced the battery terminal ends. Cranked it up and let it run for ~25 mins with everything from the window defroster to the hi-beams running. Barely dipped below 14v. Thanks for the no-frills videos, ChrisFix! And a side note for anyone seeing this, the videos on how to super-detail your car are absolute S-Tier. I do these deep cleans 2x yearly and my vehicles look amazing

@mmsheow Год назад

Thank you. I am single and desire to learn and maintain my 07’ Ford Explorer. I appreciate you for taking the time to show the steps & thought process (how and why) you perform the checks and the performance expectations. Am liking and subscribing. You made this very easy to understand & do. THANK YOU!

@guichozambada5867 4 года назад

Damn great video 👍👍I learned all this when I was in school, but hey hats off For you man you explained really well

@beginnerbeginner978 4 года назад

Putting u in my favorites lol.good video well done

@odeanTeldja 11 месяцев назад

GREAT job Chris. Clear and precise.

@lexsoft3969 4 года назад

I want you to show the output voltage of the alternator, i.e measured across its B terminal and its ground. However what you have displayed here is sufficient to give rough but adequate measurement of alternator performance. Measuring at battery terminals are usually sufficient for that purpose, unless we want further details. As for my car, when the engine is off, my battery voltage is about 13V; when the engine is on and no usage of other electric related parts, the battery voltage is about 14.5V. The battery is new, so that is expected. :)