change alternator and chage battrey up but the battery light want go out.
Check the voltage output of the alternator. I believe it should be 14 volts, but not sure. Check on internet for correct voltage output of alternator then check. If lower than specified, the alternator is bad,
Also, make sure all your ground wire connections are good and clean.
Search Ford F-150 Questions
Ford F-150 Experts
Related Models For Sale
Used Cars For Sale