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How to Test an Alternator

ChrisFix
10.7M subscribers
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10M views 10 years ago
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:    • How to Test a Car Battery with a Mult...   Check for Parasitic Draw:    • How to Find a Short in your Car   Top 10 Mistakes Car Owners Make:    • Top 10 Mistakes Car Owners Make   *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:   / chrisfix8   -Twitter:   / chris …...more
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test your alternator

0:02

test the alternator

0:30

see if the alternator is working

1:00

start the car

1:03

put a load on the battery

2:01

turn all the accessories on the voltage

3:24

check the wires to the external voltage regulator

4:10

connect the black lead to the negative side of the battery

4:45

find your problem between the connection of the alternator

6:02

clean the connection between your mounting bracket and your engine block

6:32

test the voltage drop across the alternator

7:07

remember to rev up the engine to about 1500 rpms

7:34
How to Test an Alternator
163KLikes
10,019,081Views
2014May 14
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:    • How to Test a Car Battery with a Mult...   Check for Parasitic Draw:    • How to Find a Short in your Car   Top 10 Mistakes Car Owners Make:    • Top 10 Mistakes Car Owners Make   *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:   / chrisfix8   -Twitter:   / chrisfixed   -Instagram:   / chrisfixit   -Subscribe Here: http://www.youtube.com/subscription_c... -YouTube Channel:    / 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.

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ChrisFix

10.7M subscribers