If it's not cranking at all, it could be the keyswitch, a bad connection somewhere, the starter or the neutral lockout switch.
put in new alternator but it will not charge battery. alternator was tested and found to be good. why wont it charge the battery?
I have a 1997 ford expedition that the alternator is not charging the battery. Had the alternator tested and it was good the battery is new. Cant find the fuse for the alternator does anyone know where it is?
Have your battery tested first, if it is good most likely it is a bad alternator, have that tested as well
Most likely cable running from stud on top of alternator to battery terminal is corroded or broken.
A new battery or one that tested good is in the vehicle and the car is still losing power. the alternator is what charges the battery while the vehicle is operating.
The battery light comes on when the alternator is either over or under charging. If the alternator tested good you have a wiring or computer problem. The engine computer is the voltage regulator.
have the battery tested, average life of a battery is 2 to 3 years. if battery is good check voltage regulator and starter motor. there is a short somewhere if the battery is good
Perhaps starter is weak. Have it tested for load and drag
Loose or corroded connections or the battery has a dead cell and will not accept a charge and must be replaced.
test the voltage on the battery first, then on the alternator. If its good then it could just be the diode in the alternator. I would suggest you replace it becuase eventually your alternator will die and the battery will not get charged leaving you stranded somewhere. It is possible to just be a battery but you wont know unless you have the battery tested. check the voltage on the battery and the alternator before you do anything else.
battery and or alternator are shot, check alternator by starting the car, and removing either the positive or negative battery cable,,, if the vehicle continues to run the alternator is good.
either your belt is loose or alternator is faulting out go to nearest part store and have it tested for most accurate test remove alternator from vehicle I've had that happen before and in the vehicle alternator tested good. removed from vehicle it tested bad. replace alternator no further problems