There are 3 screws in the chrome skirt of the light. Remove them and lift the skirt straight up. On top of the light base you should find 3 nuts (7/16's) use a wrench to remove them. Use a screw driver to loosen the power wire.The light should now be free. Pick it straight up and off the car. If you need to remove the toggle bolts, there will be 3 more nuts down against the roof of the car. Remove them and the bolts should fall through into the passenger compartment.
I'm not positive, but I do believe the 184 has the same bolt pattern as all other Federal Beacons.
Straight and simple, down and dirty, there it is!!! Have fun!!!