One problem related to battery has been reported for the 2001 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Ford F-150 based on all problems reported for the 2001 F-150.
Windshield leak on 2001 f150 has leaked into gem module and fuse box. Now in shop for second time Ford dealer will now replace windshield and other electrical components. First trip to shop they said it was the battery. I paid for that and the towing charge. A bit of internet searching leads me to believe this is a well known and documented problem with Ford trucks and suvs. Odi has looked into this before.