All of your symptoms are indicating lack of power to the aft fuse box.I clean all the grounds and replaced the 125 amp fuse .
Battery light is still on And gauges do you to not move and radio still dead.
One of the least expensive, highly recommended projects there is. It might not resolve the issue, but it's a good start IMHO. Others have offered very good advice. They may or may not recommend replacing the ignition switch at this point as it could impact other troubleshooting. Whatever advice they have, be sure and follow it.I noticed a while back that the acc side of ign switch didn’t work. But after starting the engine everything worked.
Should I entertain the ign switch replacement?