Jon Mello

So I have a 2005 RS pretty much stock not sure if previous owner put any mods on looks like a aftermarket gauge and a turbo timer might have been there but were removed before I bought it, i checked to see if I had a short somewhere because I've had 2 batteries die since I got the car about 8 months ago and there's been electrical failures such as reverse lights, boost control, and cluster lights burning out. After testing I found there is a short coming from the dome light (#22 fuse) I was curious on where to start at to find the short. It doesn't have many power accessories because it's a rs trim so I'm not sure what exactly to check in the car. Any help would be appreciated thank you.