My God, that blue has such an imposing presence.
Fuse 1 feeds:
ignition switch
park lamps switch
stop lamp switch
feed for courtesy lamps
The easiest way to test is an automotive circuit breaker, no bigger than 15 amp for this circuit. Disconnect the battery. Insert or clip the CB in place of the fuse. Reconnect the battery, all the switches off. Then just check each circuit one at a time. When you trip the breaker, you've found the circuit giving heartburn. It could be, but I'm doubting it's your ignition switch. That was just the symptom that announced itself.
Edit: I read a bit more carefully, you said the second fuse blew immediately. Were either of the front doors or the liftgate open when this happened?
Fuse 1 feeds:
ignition switch
park lamps switch
stop lamp switch
feed for courtesy lamps
The easiest way to test is an automotive circuit breaker, no bigger than 15 amp for this circuit. Disconnect the battery. Insert or clip the CB in place of the fuse. Reconnect the battery, all the switches off. Then just check each circuit one at a time. When you trip the breaker, you've found the circuit giving heartburn. It could be, but I'm doubting it's your ignition switch. That was just the symptom that announced itself.
Edit: I read a bit more carefully, you said the second fuse blew immediately. Were either of the front doors or the liftgate open when this happened?
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