If you look at the labeling on the fuse box, it should show all your fuse locations with numbers next to them. Look carefully, and #4 and #11 will be there. I can't remember which is which, but one of them will definitly be a 3 amp fuse. Also, before you spend money on a new 02 sensor, check your Haynes/Chilton manual on the procedure for testing the sensor. Almost all electrical sensors can be tested one way or another.
I will check my manual tomorrow am and get back to you on that.
One more thing, when you unplugged the sensor wire, did you actually see any water in the contacts? If so, then I would highly recommend cleaning them with the contact cleaner, just cause it will dry up any moisture that is still remaining. If you go buy a new 02 sensor and plug it into a wet contact, you might just blow a new sensor... thats my .02 anyway
