Had same problem....fuses okay in power center. Started looking for the famous...could be anywhere....fuse, never have found it if there is one. Next checked for power at switch...none. Broken wire/ loose connection? Checked connection, all okay. So, I ended up jumping to other slide switch and opening/ closing, one slide at a time, have not had a problem since. I also powered up dead feed wire, working from switch back toward power center... no body home. Have to live with it.
Bob/Linda, 99 Dodge 2500 Cummins,2010 8280 Rockwood Ultra-lite 5er, PullRite Superglide-----
I'm retired......but work part time as a pain in the ass!........... USMC.