Was wondering if anyone can help with this issue. The backlight of my dash gauges (speedometer, air brake, etc) is currently not working. Other lights (like the AC cluster, the 5th wheel slide, and the air dump) are working, however. Looked at the fuse panel diagram, and thought it was C10, but that fuse is good. Does anyone know what fuse controls the gauges backlight in a Peterbuilt 579, made in 2020? Thanks for any help!