How can I test my ignition switch on F-250, '01 model

My 2001 F-250, v-10 gas burner is killing my battery. I drive on weekends only & it sits all week. For the past couple of weeks, my 2 month old Interstate battery has been dead. When I opened the driver's door, I noticed the heat was running, the CB was making a "popping" noise, the radio was playing, the door open bell was dinging, etc.(Key was in my hand, not in ignition)I have the Viper Alarm system on it and a few extra electronics. Worried there's too much extra's omn truck or could be harness. I heard this truck is notorius for bad ignition switches. Could this be my ignition switch gone bad? Ground seemed good from battery. Fuses all good.