I am very familiar with battery drain. Pull the fan delay relay out. Throw in garbage. First check the battery with a multimeter, should have about 12.4V. Do you have Scanmaster, if so should be about 12.7-14.0 bouncing (car running). Remember the Scanmaster reads about .5V lower than at the alternator. If you don't have a Scanmaster you could hook up the multimeter to the battery. Those 2 tests can come back positive and you could still have a bad battery though. Assuming they came back good, do as the link provides with the negative cable. Look for your draw and then start pulling fuses. My cigarette lighter was corroded as well as a fusible link conection. 3 days is way too soon for the car to go dead.
Other possible issues would be the little pins near the door hinges, they could not close the circuit properly and the glove box/trunk/hood lights.