Since you replaced the ign sw, I think someone has wired it up wrong.
Any experience tracing wires? Got any pics of the switch itself from the backside of it with the connector?
Might be just a matter of moving wires from the switch to the proper breakers which are fed from the silver round solenoids you here when you turn the switch to ON.
Let us know what you got there, can't be too difficult.
Get yourself a multimeter too and learn how to use and read it.