a 2000 ford lincoln Navigator  the passive anti theft transceiver,cluster,ignition coils, powertrain  control module fuse 30 keeps blowing ?

There is a short in the fuse 30 circuit.  You will need a wiring diagram and find the other fuses that gets its power from fuse 30.  Check wiring harness for burnt marks or frayed wiring that is touching ground. 

You can also try doing the old school way of looking for a short, power the circuit and look for the smoke!  Do this only if you know what you are doing.  Good luck.