Battery wont keep charge

I suggest that the problem is not in the alternators but in the battery . Dirty battery posts and terminals will do this so ensure that they are shiny clean and tight. Next have the battery load tested for a faulty cell or broken cell bridge.

its your starter relay

Check the charging relay if working. You can find it in the fuse box which is either in the engine compartment or under the dashboard on the drivers side legroom.

sounds like your alternator then
if alternator is not working, it is not charging the battery whilst driving

CHECK BATTERY VOLTAGE WITH TRUCK IDLING.SHOULD BE 13.5 - 14.5 VOLTS. IF NOT ALTERNATOR NOT CHARGING BATTERY.IF ALTERNATOR NOT WORKING TO KEEP BATTERY CHARGE.THE TRUCK WONT RUN RIGHT.YOU PCM,CANT FUNCTION AND CONTROL ALL THE ENGINE CONTROL SYSTEMS.YOUR FUEL SYSTEM , SPARK SYSTEM NOT GOING TO WORK IF BATTERY DONT HAVE POWER AND ALTERNATOR NOT WORKING. CHECK ALTERNATOR POWER FEED WIRE AND VOLTAGE REGULATOR WIRES AND CHECK ALTERNATOR FUSE.MAKE SURE ALTERNATOR GETTING GOOD 12.6 VOLTS FROM BATTERY.MAKE SURE BATTERY FEED WIRE NOT BROKEN.

if your battery died while driving and the car cut off while your driving,, your problem is from your alternator!!!,, on a normal working car, you can start, remove ther battery terminals and the car would still run cause the alternator will be powering the car. In your case the alternator isnt working and the car was working on battery power therefore when the battery went dead the car cut off.. Your alternator need \s to be charging between 13.5 and 14.2 volts.. as little as 10 volts will keep the vehicle running.. I'd suggest you have the alternator replaced.

CHECK THE FUSE OF THE ALTERNATOR OR CHECK IF THE ALTERNATOR IS CHARGING

Sounds like an alternator. When it goes bad, your car is forced to run off of the battery , which wont last long depending on what all you have running .
The alternator keeps your battery charged after your car starts.
Try replacing the alternator and let me know if you have any more problems.

check the air ride suspension system if that is causing the problem the car maybe trying to lift the rear end and it will cause the battery to lose charge check in the trunk for a shut off switch and see if that helps

hi check the charging rate at your battery terminals under load [lights on heater on wipers etc] if drops below 13v with these on its to low if you have checked the output of the alternator at the alternator it should read not under 14v and not over 14.5v i think you will find the regulator is in the alternator or on the outside of it but if your readings at the battery are correct test your battery with a voltdrop test or if the batterys flat take the tops off get someone to keep the key in start position and see if the cells are bubbling it only takes one is so replace the battery yates210456