Looking at what I posted for the wiring diagram, I am definitely going to change the F22 fuse in the BCM to at least 20A and make sure the connecting wires are the right gauge. 5A is probably a good rating for each individual upfitter switch, but definitely not a good rating for 4 of them combined, pretty wimpy. I'll think I'll also change the upfitter box fuse to at least a 10A fuse and make sure the wire gauge for that is appropriate as well. If I add an accessory greater than 5A to an upfitter switch, then I'll need to make sure that the main supply fuse can handle that plus an additional upfitter switch requirement (or two or three or four) used simultaneously.