Car Battery Charger | How to Change a Car Battery : How to Test an Alternator

24 Responses to “How to Change a Car Battery : How to Test an Alternator”

1. dereileak

   that electrical system sucks, mine charges at 14.5 volts, and I was able to get a 9 volt dead battery back up to 12.8 volts in about 10 minutes

2. willfightformoney18

   you can jump your car and drive it, but while your driving is what you have to worry about, your battery is only ment to start the car the alternator is ment to keep your battery charged, your car cannot run for long on just battery power, therefor your car will die due to no charge to your spark plugs, so your pretty much wasting money on a new battery

3. PRICHMOT

   mine starts with a little push lol

4. jrlannum

   well your battery might just be bad cuz if you can jump your car and drive it, its definately not the alternator cuz if it was even if you jumped your battery your car would shut off in 5 mins or less, so i’d say get a new battery, that should work. and if you have an amp for speakers or some thing that runs while the car is off, it’ll drain the battery

5. jrlannum

   I agree with m1sterh0tsauc2 and fuck you Rober5185, your a fucking dumbass, he put this video on here so people who aint got the fuckin money to spend on somethin so simple, not everybody’s a rich fag like you that has there fuckin mommy and daddy buy em everything, most people have to work for there money and earn it not just have it givin to them. go think bout that

6. MARCUSxFENIX

   amps

7. SirTragain

   You can get a magnetic field produced from the starter too, that doesnt mean it has a working voltage regulator on it

8. SirTragain

   Though your suggestion can work for older cars, using that method on newer cars can damage its computer especially if you get a spark at the terminal which sends a spike back into the electronics.

   The proper way to test a battery is with a load tester.

9. 1beerguzzler1

   Idiot. When checking the charging rate you need to do it in AMPS not VOLTS. You want to know what the Alternator is putting in NOT what the battery is putting out. Volts have nothing to do with the charging rate.

10. youdragon

    i have a stock 97 gmc truck think my alt can handle 4 100 watt off road lights?

11. danielhattie2000

    your lights will come on even if the battery is fried you should start the car then unhook the battery if the car dies you have a bad alt if it satys running you most likely have a bad batt.

12. danielhattie2000

    then it with pull the screwdriver into the pulley and throw it at your head lol

13. Robert5185

    …and an amateur he is. Just because you got some ASE certificate doesn’t make you an engineer or an expert on any level. Experience and knowledge is what shows true mechanic craftsmanship, and it certainly doesn’t make you a good business person either.

14. m1sterh0tsauc3

    he didn’t do anything to damage any area of the car, he mearly tested the battery and alternator…anybody can do that. Why would you take your car to a professional for a job that can be done by a amateur…

15. YouEatTurds

    is it possible for my battery to be dead but still have my dome/head lights functioning properly? i just jumped my car even though my lights all worked and everything was fine until the next day i put the key in and NOTHING. i jumped the battery again and it’ll probably be dead again soon. i’m worried it could be something worse than just the battery because of the functioning lights because i thought that if it were the battery i shouldn’t have any electricity at all. any thoughts?

16. nandinito

    I’m a professional, dude, and this guy knows what he is talking about, the one who should know how to be a real man is you, and not to run like little girl screaming for help when have a little problem with the car.

17. Robert5185

    This guy is full of shit don’t listen to him he will fry your electrical system. Just take your car to a professional not these NTB fags they are borderline retards no wait they are retards !!!

18. 1godfather01

    then its probably on backwards lol i dunno

19. chev1988rolet

    hey agent7vm, what if it produces a magnetic force at the pulley

20. D3aThB3cK0nS

    ¤ø„¸¸„ø¤º°¨¸„ø¤º°¨ post to 3 other vids
    ¨°º¤ø„¸ Copy „ø¤º°¨ press F5 twice
    ¸„ø¤º°¨Paste “°º¤ø„¸ OK
    ¸„ø¤º°¨¸„ø¤º°¨¨°º look at ur backgroud

21. agent7vm

    Some MOre tips for when you dont have a multimeter:
    If the car dies when you disconect the battery that means the alternator is not producing any power
    Also when alternator is working properly will produce a magnetic force at the rear side of the shaft place a screwdriver close to it, if it pulls it that means alternator is generating power.

22. RAMuzza8

    thanks! this will help a lot!!

23. grotum

    You didn’t load test while the car was running. Unless you had accessories on while you had the motor runnig.

24. Mackiebrat

    Very good basics . I’m impressed. I have 47 years in starting & charging systems service and rebuilding.

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