2002 chrysler 300m wont start just makes clicking sound like machine gun. Have taken battery out cleaned terminals and tested battery tested good. When it gets jumped starts fine. But once shut off wont start till jumped again

Believe it or not it sounds like just bad battery or dirty battery terminal connections. Be sure to remove the terminals from the posts and wire brush inside the terminals and the outside of both posts. If you've already cleaned them then bring it inside the garage and put it on a battery charger on low, 2 amp charge, overnight. If it still doesn't start then remove the battery and take it to a local parts store. They can load test the battery and tell you if it's any good before purchasing a new one. Usually, on the side of the battery there will be a tag with a letter and a number. Say, G-4. The letter is the month, A=Jan, B= Feb, C=Mar, etc and the number is the year. 2=2002, 3=2003, 4=2004, etc. If your battery is more than 5 years old, just go get a new one and start there. ALL parts of these newer cars need full 12.5 volts to start, run and function.
I hope this helps

This could be an issue of a bad starter. The starter can be tested but it needs to be taken off the vehicle and tested on a machine which puts a load on it to see if it is working properly. Auto Zone and Advance Auto will test the starter fr free.

Hello Sandra, my name is Andres and i willhelp you with your problem and to start with i need you to check fisicly the terminals of your battery i know is a little hidden but try to see if there is not corrosion on the terminals, if yo clean and test the battery, if that is not your case do you have the ckeck engine light on ? make sure if you do to take it to the closes autoparts for a free OBD2 SCAN and see if you have a crank shaft position sensor or camshaftposition sensor,again if that is not your case check your starter for false contact of defective starter

Clean battery terminals. Then buy a cheap tester that plugs into cig lighter about 5 dollars The battery should be about 12.6 volts just sitting. Start car and meter should read 13.8 or above if not replace alternator if it reads good and the battery is charged up turn off car turn on headlight for 2 seconds turn off and read meter it should read 12.6 if not replace battery or have it tested for free at autoparts store. If they load test battery and say it is good and the charging system shows good then your starter is drawing to much power remove starter have it tested for free at auto parts store. If they say you need a rebuilt have them test it before you take it home

Sounds like the starter isn't getting enough Battery to engage and start the motor. Remove battery terminals, neg first for safety, then the pos. Clean both with a tool made for cleaning these, not expensive at all. Lubricate with a good grease to make sure they don't corrode. Always go to the simplest and cheapest thing first. You'll kick yourself if you buy a Battery for a $100. then find out it just needed cleaned. Try to start it and if it doesn't jump it over or charge it up, get it running then drive down to a reputable Technician or Auto Zone type and let them put a quality test on the battery. If it was just a loose terminal don't stop there, clean the terminals.

Check connections on starter motor check all earthing points if that fail`s sound`s like starter.......

sounds like a bad connection at or from the battery. If the battery is dirty,clean it and the terminals, provided the battery is good. How did you check the battery and the alternator?

Like I was saying just a few lines ago, it could be a ground that is dirty. (COULD BE).
Clean all the terminals on the battery, have the alternator tested, clean the terminal for the + and the - in the engine compartment, and reach in and clean any ground you can find on the engine (carefully). It could also be a set of bad cables for both sides of the battery. This is one of those trial and error situations, but if you do it logically, you can narrow it down. Start with the alternator test, clean the cables (or replace) and keep going until you hit on your issue. Good luck and GO!.

possibilities are connections at battery corroded or loose battery dieing not holding charge alternator not charging battery or starter shorted out or connection problem try to boost vehicle if starts have battery /alternator tested for proper working order

Clean your battery terminal contact surfaces and verify actual battery voltage (should be at least 12v) Also check that both battery cables are secure and clean on other end. Then, check starter relay if problem continues.