It doesn't crank the battery is fully charged

Battery dead or starter defect....mostly the first.

If booster is fully charged and the vehicle battery is almost discharged it is inevitable some battery charging will take place but it is likely to be a slow and incomplete process and could shorten the life of the booster which isn't built for such work.

It is also worth noting the car alternator is also not built for charging the battery and is often incapable of doing so. The purpose of the car alternator is to keep a fully charged battery fully charged and a discharged battery can even cause damage to an alternator.

Hi Victoria, The link below is a short youtube video on how to fix a car that cranks but doesn't start, I hope
this helped....CHEERS..
https://www.youtube.com/watch?v=064Ilsz8Fzg
Fixing Car That Cranks But Doesn Start Up

Start with the basics, here. Check that battery cables are not loose and are CLEAN, on the battery AND the starter. Beyond that, check the battery charge with a volt meter. Fully charged should be 12.5 volts or higher, you will lose starter spin at 10 volts. If the battery is low, hook it up to a charger and charge it up completely. If you don\'t have a voltmeter, go to the store and buy one. If you\'re going to try and fix things like this, you have to have one. If you can\'t do that, remove the battery and take it to someplace like AutoZone. They will charge and test the battery for free. If you can\'t take the battery out, or don\'t have a friend that can, have the car towed to your mechanic.



Here\'s the thing- I can\'t tell you exactly why, but some cars you just can\'t jump start. Happens more on side mount post type batteries. Because you can\'t jump your car doesn\'t mean it won\'t start with a fully charged battery. Now there are other things that could be wrong with you car, that it won\'t crank over and start for you.....but we begin the diagnosis with the battery.

sound like dead battery.no power to fuses if battery dead use digital voltmeter check battery volts should 12.6 volts if not have battery charged tested.if battery 4 or 5 years old battery could be faulty.

Fix your car right away by clicking the link I attached 2001 Jeep Wrangler

Yo! Your battery doesnt have enough power to crank your engine.that has got to be a problem with your alternator.it is meant to charge your battery.please replace the alternator so it will charge your battery

Check all the fuses and fusible links,the links are most likely on the starter.

Try having the vehicle jump started to see if it will start that way. If so, your battery is not holding enough of a charge to crank the engine. If it still doesn;t start the solenoid or starter is bad.