Replace the switch beside your seat. It's bad. If it where the switch under the dash at the steering column you would have troubles putting it in gear.
Check the fuse and relay there is also a cable attached on it to a gear assembly if it needs to be replaced as a system you must index mark it for disassembly and reassembly this is a very difficult repair to do so check all the electrical stuff first before you try this search your manual for the fuse and relay locations for your year 2003-05 are the same also lincolnonline.com, gives you the procedure to follow
Answers & Comments
Replace the switch beside your seat. It's bad. If it where the switch under the dash at the steering column you would have troubles putting it in gear.
Check the fuse and relay there is also a cable attached on it to a gear assembly if it needs to be replaced as a system you must index mark it for disassembly and reassembly this is a very difficult repair to do so check all the electrical stuff first before you try this search your manual for the fuse and relay locations for your year 2003-05 are the same also lincolnonline.com, gives you the procedure to follow