My 2002,ford focus se 5 SPD won't start at all no sound when key is turned. When key is in start position no dash lights come on and my anti theft light above hazards blinks continuously any ideas?

Disconnect the battery and clamp the two cables together for about 15mins to drain the memory off the computer then try again.

security lockout

With some Ford Explorers, you can simply disconnect the battery for a couple of days to allow the computer to reset. That probably won't work for your Focus.

Try this. No guarantees. Enter your vehicle with your ignition key and remote and insert your key into the ignition. Turn the ignition key from "Off" to "Run" eight times in the first 10 seconds, and end the eighth turn in the "Run" position. This just might give you a good result.

Sounds like a blown fuse. Some fords will set security if certain fuses blow.

this will sound odd, but I was having the same issue, and I tried everything on this forum but I wasn't getting anywhere, but I decided to check all my fuses under the dash and found out on my 2010 Ford E350 fuse #54 fuel pump relay coil, was blown, I replaced it and the van started right up, I was having all the issues of a PAT system failure, dash lights on, security light blinking, and advance track service light on.

Try this,remove key from car,remove positive cable for about ten minutes,then place key in car and turn to the on position,then replace battery cable,should reset,but if not you may have to take it to dealer to reset it. Cargurus quote.

As to the below, it is something you do at your own risk.

Ford Focus No Start Theft Light Blinking Easy Fix

Has any work been done on the car recently? If so take it back. Possibility the antitheft system has been Hacked, or attempted hack. Dealer or competent repair shop. Possibly upto date locksmith can help.

Sounds like your immobiliser has a fault and is engaging when it should not be. One of the functions of the immobiliser is to engage when the battery power has been disconnected, this is an anti theft precaution against someone trying to tamper with the electrics when attempting to hot wire the car. Have Ford reset the immobiliser anti theft system.

This could be caused by either a faulty Crank Shaft Position Sensor or the anti-theft system. Try put key in, turn to ON position for EXACTLY 10 minutes, As SOON as anti-theft light shuts off or stops flashing, then IMMEDIATELY start the engine.