door locks, power seat, gas door reliese in op on my 2002 grand marquis

Did you check your fuses? If not Door lock problem sounds like actuator inside that door- or is it all?

You can start by checking all of the fuses to see if one is blown. If you dont find one, there could be a problem with the wiring under the carpet, or a problem with the fuse block. If that is the case, it is probably time to get some help in the form of a wiring diagram, or someone with the skill to troubleshoot the electrical issues. Let us know if we can help in any way.