2004 Lincoln town car has no power

The easiest suggestion would be check battery terminals make sure they are clean and tight . Is still persists check starter wire make sure it's tight and not burnt or corroded . Next check engine ground make sure it's tight and attached properly to engine . Next check your still have the same issue would be ignition switch . Sit in car amd try to start car as you normally would if n o start take key out of ignition slowly put into ignitor cylinder and slowly turn to start car .try several times varying the speed you turn the key if it starts pr attempts to b start you have a bad igniting switch (electrical part ) . If not it could be s.defective key . (Coded key ) . One last thing I can't remember but of you must press the brake.pedal to start engine it could be the shift interlock cable causing a non start problem Good luck