I have PDL on a 1993 F-150. What all would be involved in upgrading to keyless entry? Is it just a matter of getting the key fobs? Or does it require a ECU upgrade?

 

Factory installed Remote Keyless Entry was not available on a '93 model so the wiring harness will not accept the module necessary to add it. After market is easy enough to add and most radio installers can fix you up.