Sounds Like You Have A Voltage Drain, That Is Something Is On Or Grounded In The Car. To Test This Buy A Test Light At Parts House. Rermove The Negetive Cable From Battery, Leaving The Positive Cable Attached To The Battery. Connect Test Light Between Negetive Cable And Negative Battery Terminal: If Light Comes On You Have Something On Or Grounded. Remove The Bulb From Hood Light First ( The On That Lights Up When You Open Engine Compartment--HOOD }. Turn Off Ignition When And If You Find The Problem The Light Will Go Out. This Is The Best Way To Find Your Problem. PLEASE NOTE ++++++++ If The Light Don`t Come On. Your Battery Is Probably Bad. In Fact Go Have The Battery Tested First !!!! Then Replace If It Is Weak Or Bad. If That Don`t Work Try The Things Above. HOPE THIS ISN`T TOO MANY THINGS. GOOD LUCK --Try look for a fuse. There should be a Fuse that connects the Battery to Alternator. It by be burn out
u might need a new starter
Have you had the alternator tested? Often a bad internal diode can drain the alternator overnight.
A partial earth
Had the same problem. Bought a re-conditioned alternator, turned out it was bad. Usually if battery draining, it's alternator or battery or both.
The computer only resets when the battery is removed. The alternator just charges the battery, so if the battery is left connected when the alternator is replaced, the computer should not reset.
Then either something is on draining the battery or the battery has a dead cell draining all the rest and must be replaced.
the battery is dead and needs to be charged or replaced, or it could also be the alternator is going bad
Something is on draining your battery overnight. Any light or any relay. It can also be your battery has a dead cell draining it overnight.
Can be a dead cell in the battery which means it must be replaced. Can also be something is on pulling power from the battery. Glove box, interior, under-hood, or trunk light. Can also be the alternator is defective.
Defective alternator, loose alternator drive belt, dead cell in battery, or something is on pulling power from the battery.
The battery is worn out and needs ot be replaced depending on the mth warratny it has or the alternator is going out and is draining the battery . A simple check may be the battery cable . take the positive battery cable off while running as well if it dies it's the alternator .
many things can do it suck as junk battery, junk alternator , or leaving anything on in the car