I would try to verify if the fuse blows with the movement of the BR slide or if it only does it with movement of the coach going down the road. If it we me, I'd turn on the "over the bed lights" and stand there and watch the lights, while someone exercises the BR slide (may want to do it several times). If it blows the fuse when that happens, pull the lights down and inspect wires/socket, then if OK, pulls the junk
from under the bed and pull the access panel and get to work viewing the wiring, especially where it gets close to the ram operations. If it doesn't blow the fuse, you may follow the wires outside the BR slide area and looked for chaffed or bare wires getting to ground somewhere. Hope this makes sense to you. This is where I'd start. Don't try to oversize the fuse, not a good idea. Always keep in mind to do the easiest things first! It's easy to get carried away and start yanking stuff out without thinking. Please keep us posted on your finding!
I would also find out what else is on that light circuit. Tom