My 2000 F150 lariat will not start, I thought that I had run it out of gas, the fuel light came on but the gauge never got into the red area, I put gas in and it still would not start. I have checked fuel shut off switch it was not tripped. I also thought that it might be the passive anti-theft system not letting it start, but I'm still not sure that that is not the issue however the anti-theft light that flashes on the dashboard is still flashing normally. Any help with this issue would be appreciated.

 

Have you tried your spare key?
If PATS is not satisfied, no start.
Put key in, set to run and wait a few minutes then see what the light does.
If it begins to flash you have a PATS issue.

 

Yea I thought of the pats but the anti-theft light was operating as normal, as I mentioned i was low on fuel enough to cause the light to come on but not really into the red, but after some discussion with my brother in-law, he suggested that it might be the fuel pump and that I should listen to see if I heard the pump engage an if not to tap on the tank with a rubber hammer to free up the fuel pump contacts, I did that and it worked if it happens again I will replace the fuel pump.

 

guess what? The pump assembly has no contacts. The leads from the pump go to the top flange mounting socket.
You may have a connector issue on top outside of the tank.
Can't have possible opens and arcing inside a tank from any type splice or connectors unless you like a free ride to the Moon unannounced!
BTW the pump depends on the gas for cooling so don't run it so low on a regular basis.
The only other thing is the pump can seize from dirt that got by the pickup screen.
Good luck.