2000 S-Type 4.0

I have a 2000 s-type 4.0 with 80,000 miles and this is actually the first problem I have ever had with the vehicle but I noticed that the trunk switch on the exterior of the car was no longer working. I replaced the switch and realized one of my tag lights wasn't working, upon inspection of the bulb I realized the bulb wasn't blown and my new trunk switch was not getting any power and still wouldn't work. So I am assuming it must be an electrical short. Any ideas? Anyone know how to find the short? My trunk will open if I use my remote or the trunk button inside the car, I checked the fuses and their all ok, and other than the one tag light (which I replaced the bulb as well, and it still didn't work) and my trunk switch everything else seems to be working fine.