ive got a 2004 Ford F150 fx4 4x4...i was wondering if someone can help me out...i took my truck in to get fixed and when i got it back,,the Remote Door Locks Wont work and i am not able to start my truck from the remote..when i start to drive,,my Horn will chirp for 3 beeps...i bought the truck used and not sure if its factory or not..i seen the box in the bottom of the dash and its blue..

Also can somone point me to where the How To reprogram Transmittors DIY is...i seen it before but i just cant seem to find it..

 

You will need to take a closer look at the unit, to see if it is factory or not. The color alone does not help much in the determination of the brand ( at best it would be a guess ).

Reprogramming what transmitters ?

If you are talking about for remote start, you will need to know the brand of the remote start to get this info.

If you are talking about the Ford RKE ( Remote Keyless Entry ) fobs, that is in your owners manual.