When the anti theft system is not working in your 2007 ford ranger the first thing you should do is try to reset it. resetting the system in your truck is a pretty simple process that should only take a few minutes. the first thing that you should do is put the key in the ignition and rotate it from run to stop eight times and stop ion the on position. when the doors lock on the truck that is a sign that the system has reset. if that does not fix the anti theft system in your car then i recommend that you take it to a dealership to let them look at the computer system to make sure there are not any problems.
To reset the 2007 ford ranger anti theft press the panic button on the key fob, then place your key into the slot in the ignition and turn it to the on position three times