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: https://amzn.to/3sy10xH
Test your Battery: https://www.youtube.com/watch?v=COJr7OB23Hw
Check for Parasitic Draw: https://www.youtube.com/watch?v=n5FJDgcdii8
Top 10 Mistakes Car Owners Make: https://www.youtube.com/watch?v=gkn-K2noClw
**If the video was helpful, remember to give it a "thumbs up" and consider subscribing. New videos every Thursday**
-Website: https://www.ChrisFixed.com
-Facebook: https://www.facebook.com/chrisfix8
-Twitter: https://twitter.com/ChrisFixed
-Instagram: https://instagram.com/chrisfixit
-Subscribe Here: http://www.youtube.com/subscription_center?add_user=paintballoo7
-YouTube Channel: https://www.youtube.com/ChrisFix
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.
Here is a great multimeter for under $20: https://amzn.to/3sy10xH
Test your Battery: https://www.youtube.com/watch?v=COJr7OB23Hw
Check for Parasitic Draw: https://www.youtube.com/watch?v=n5FJDgcdii8
Top 10 Mistakes Car Owners Make: https://www.youtube.com/watch?v=gkn-K2noClw
**If the video was helpful, remember to give it a "thumbs up" and consider subscribing. New videos every Thursday**
-Website: https://www.ChrisFixed.com
-Facebook: https://www.facebook.com/chrisfix8
-Twitter: https://twitter.com/ChrisFixed
-Instagram: https://instagram.com/chrisfixit
-Subscribe Here: http://www.youtube.com/subscription_center?add_user=paintballoo7
-YouTube Channel: https://www.youtube.com/ChrisFix
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.
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
So to check the ground,you use the positive cable to touch the ground ,and the negative?is on the battery negative side isnt ?
Thanks for the video. Off to check my alternator to see why my car didn't start this morning.
Awsome 👍
Battery died twice it was a brand new battery Honda has not been moving two years when I will turn it on I hear a bearing noise I remove the alternator, turn the car on and the noise continues so it was not the alternator I put it back, But that’s when the battery died, had to jumpstart it, I follow the steps on this video and the problem was I did not connect the cable from battery to the alternator it looked like it was connected but it was not, I learned to check every connection in detail so you can pinpoint the problem exactly good video
How do i get to those fibers? Mine are rubber sealed
Can somone tell me why after putting a new alternator it idls up and down and stays steady for a while even a long while then it idles up and down even while driving as i slow down…is this what this a bad remanufactured alernator or is it a low amp alternator not maching the recommend running apms for the car? Right now im going to put back the old alternator because it had no no issues it idling was perfect…..i installed a new altornator because it was new and never used. it was for my old nissan sentra but i junked the car…so i had this new alternator that matched my parent's car identically. Need some advise
So helpful! Thank you!
Great video, thanks for your help
Absolutely fantastic video. Thank you.
Thank You for sharing your knowledge in a very detailed informative and understandable manner without the nonsense,(boring, confusing and unnecessary babble) wasting valuable time while never giving a clear answer to the related question. 🙏🏻
Great info. I watched it 3 times. I love learning car stuff on YouTube. Some many people to thank for helping throughout the years. You made a sub out of this guy! Thank you for the video. Cant wait to binge watch your older videos. Welp, here I go!
Just some constructive feedback…not sure if any of the other 4500+ comments called this out, but your description literally starts out with, "Does your car not start…?" But then you only offer tests that require STARTING your car. Since my Jeep wont start, this was frustrating.
This stuff's only for people that took auto mechanics in high school. Not gonna help me..
I could never find all these leads posts wires contact points in a million years let alone do the tests right
Do all alternators have ground wires, or are some grounded through the alternator casing?