It is possible but could be more than one problem and might take some time to solve all. The back up lights uses a direct power supply from the ignition to the switch and then the back up light bulbs and ground.
Start by checking for battery voltage to the switch, is this an automatic or manual transmission vehicle?
For the radio, remove the radio and check the connectors and ground circuit. That could be related to the seat belt buzzer, but then the seat belt buzzer could be due to a fault with the seat buckle switch.
For the taillights, remove all bulbs related to the system for the exteriors and turn on the lights to test if the fuse still blowa.
Monday, February 27th, 2012 AT 3:29 PM