Do you mean charge by the vehicle running....or do you mean take a charge from a Bench charger? if its in the vehicle it could mean that either the battery/battery connection/cables, a faulty ground, or the alternator is defective. If its on a bench charger then the battery has a dead cell or is defective and needs replacing.
BCI group 65 ( such as Motorcraft BXT-65-650 ) that's the optional " heavy duty " battery for the 1999 Ford F-150
If you have no battery then you have no power.
defective alternator
I had this problem. The alternator was fine, it was the battery that was bad. The alternator was "pegging" out the indicator bc it was trying to charge the battery, but it wasnt taking charge. Take the battery out and have it checked.
alternator probably needs replacing not charging battery or bat is dead and not taking charge
check your battery cables. could be old or just loose.
If you are 100% sure nothing is on pulling power from the battery and it will not hold a charge then the battery has a dead cell and must be replaced.
How do you remove and replace the battery on a 2001 Ford F150?
89 f150 won't charge its not the alternotor
you should first check the battery with a load tester. fill battery charge battery test again replace if needed
Dead cell in the battery or the alternator has failed. Drive your Ford to your favorite auto parts store where they will check the charging system free of charge.
Defective battery or something is pulling power from the battery. Check the glove box light, interior lights, trunk light, hood light, brake lights, etc.