Car won't start it works when it is jumped but will not start once it is turned off? Is this likely the starter or alternator?

Hi, try using some jump leads and charging the battery, maybe its dead

its sounds like youre alternator is no good n did u check to see if youre headlites work period

Sounds like your alternator isn't working

If you just hear a click, try this:
This procedure usually works:
·Check the battery cable connections:
Make sure the positive cable, makes a good connection at the battery and at the starter. Make sure the negative cable makes a good ground connection at the battery and (preferably) at the engine.

·Check the battery the simple way, like this:
Turn on the headlights, then try to start the car.If the headlights do not dim or go out, then the battery is likely ok.

·Check the starter and solenoid:
If the wiring looks ok, then look at the starter solenoid for a good connection, and proper voltage at the starter(10 volts minimum while cranking).
If the starter spins and no crank, the problem is most likely the Solenoid's bendix gear is stuck.
Have someone hit (not too hard) the starter while you try to start the car. This usually works by dislodging a stuck bendix gear.
·Make a simple test of the alternator:
If you can, somehow get the engine running, measure the voltage at the battery. It should be at least 13.6 volts to properly charge the battery.

Have you had the flywheel ring gear checked out for worn or broken teeth this can can stop the engine turning over

Alternator doesn't have anything to do with starting the car, it supplies power to the system once the engine runs. Does your starter crank the engine? Do you get spark? Is fuel pressure correct?

jump start vehicle warm it up so its idle then disconnect the negative battery terminal ,if engine stops then the alternator is no good ,if it keeps running then renew the battery

the battery in your in car is maybe drained or damaged or the alternator which suppose to charge your battery is not working so the battery remains uncharged. One way to know if battery is not being charged, jump your car and disconnect from jump leads and take out any one of battery terminals. If engine stops, then your alternator is not working and if it remains idling, then your battery is faulty. Replace battery and see if it works.

If the car doesn't start with a jump you might have a bad alternator. The alternator supplies voltage to the car once the engine is running. If the battery is dead, and the alternator isn't putting out sufficient voltage, the engine cannot run. Then again sometimes a car with an extremely dead or internally shorted battery WON'T start with a jump. Replace the battery and try again.

Check the starter and the starter connections. freyed\loose connections...

(especially any grounds at the starter or any large common grounds)