2004 f150

I need to know if the dei 555f will work on a 2004 ford f150? I also would like to know what to do with the disarm defeat wire, not sure what it is used for!

Hey mustangpony69, No the 555F won't work. You need a 555U or any other bypass that requires a key. This vehicle is equipped with a CRYPTO factory immobilizer. Prepare your future. It wasn't the lack of stones that killed the stone age.

Use a 1L2Z  No key required.

or if you dont want to give up a key buy a blank ford crypto key have it cut and and you program it in a matter of seconds, Now you have a new key for the car!! If you go this route I can tell u how to program the key ! YOu dont need any computers or tools for this just the blank key., when buying the blank key make sure it i sthe one with a blue bubbled out ford symbol,it should look exactly like the key you use now! cost should be like 18 bucks for the key tehn you will need a 555 u or youy can build your own for maybe 1 dollar!

go to howard keys and get the key for $13 18005249199 no minimums same day shipping and build your own bypass with about 6 feet of 22 ga. wire and 1 relay and call it a day tj

doe's Howard keys sell to the public?

how do you program your own keys?

well what you need to do is have 2 keys that already start the car . Then you will take the first key by itself and put in ignition turn igniton on wait till security light goes out now quickly get the second key and do the same thing,Now take that key out and do the same thing with new blank key wait till light goes out turn ignition off .The new key should be programed now it should start the car .

programing has change a bit from earlier years now you have less time to cycle the keys in the ignition ! So have your keys within reach and ready take any keychains off the key so that it is only the key (no remote keyfobs)on the chain.

thanks for the quick reply! I will try it and see how I make out!