WEE

Hey guys. I need help, I have a 06 4.2 f-150 stx 5 speed. 6 days ago my wife drove it to work then after she killed it it failed to start. She had left the lights on for a little but I replaced the battery (it was about time anyway) It started right up ran great for 4 days got home from work went to start it 20 minutes later same thing. Let it set for an hour started right up. It worked great for 3 days drove all over today killed it and restarted multiple times then this evening same thing. Good battery, good connections, theft system seems normal gauges and lights all come up normal when the key is turned on the starter will not even click. It pull started this evening just fine and runs great. I am at a loss. What's going on?
Any help would be much appreciated! Thanks.

bourgeois1269

Maybe time for a new alternator (OEM)

PerryB

Alternator