Let me start with, I have not exhaustively confirmed all of the following myself (I do not have a complete set of schematics for the truck), but I believe it is this way:
For my 2018 all 6 Aux switches are the same. But if, I understand the way it works (as conveyed to me by a Ford tech), the switches themselves do not handle the current of the load, rather they each turn on a relay that turns on a load. This relay and the fused source feeding it determines the maximum current that can be supported by each circuit.
If you look at the under hood fuse / relay box (passenger side, between the firewall and the battery) you will find all the relays in question.
Aux 1 = Relay 12, 15 Amps
Aux 2 = Relay 55, 15 Amps
Aux 3 = Relay 88, 10 Amps (in none Raptor this is Multi Contour Seats)
Aux 4 = Relay 80, 10 Amps (in none Raptor this is Heated Wipers)
Aux 5 = Relay 19, 5 Amps
Aux 6 = Relay 62, 5 Amps
Is there an online schematic available for these trucks? All it would take is a quick look to set this question straight.
T!
GriffinAdministrator