How do you replace the Third Brake Light In a 1994 Chrysler LHS?

Open the trunk & remove the trim that is below the rear window. The third brake lamp is a LED light which is one piece and several hundred dollars, unless you can locate one from a salvage yard. If a few of the bulbs appear to be out, put on gloves & pound on the lamp assembly with your knuckles to see if they will come back to life in which was the case on my 95 LHS before taking the trim off.