OK the first three are the power feeds into the vehicle. I would test that 80 amp AND be sure it is actually feeding power. If you look at the diagram the key switch does feed and control multiple items.
The next ones show the various fuses and what they feed. Going over them it shows that the items you don't have working are not all fed through the switch. Anything tagged as "hot at all times" should have power from the battery.
Another thing you could look at would be to connect a jumper cable from the ground on the battery to a good ground on the body. It's possible that the issue is on the ground side. Those normally connect battery negative to the engine chassis and body. If one failed it would act just like there was no power because the circuit is open.
Images (Click to enlarge)
Wednesday, April 11th, 2018 AT 8:40 PM