Turn your key on and unhook the positive cable,let unhook for 15-20 minutes, and hook back up with the key still on.should start up.

Try unhooking the positive battery cable with the switch on.Let unhooked for 15 minutes.Than hook cable back up with the key still on.than shut off and try to start.It worked on my f150.

Turn your key on and let it on unhook your battery for 20 minutes then with the key still on hook your battery back up.should fix your anti theft light.

I have 2001 f150.I had the windshield resealed and then did a reset .I turn the key on and unhooked the positive battery cable for 30 minutes with the key still on I hooked the cable back up.took care of my anti-theft light.starts right up now.