I am not aware of a Kenmore 790 series range having a fuse that will cause the problem that you are having with the left side burners. A more likely cause of the failure would be a wiring problem or a control failure. There are many different types of Kenmore 790 series ranges. Some will use a control board to control the burners and others will use burner switches. Without a full model number for the range, I am not able to see the specific components that your range has. I recommend that you reply with the full model number of your range so that we can provide some specific troubleshooting help. We will assist you further once we receive the full model number.
You may find the model number on the side of the opening to the oven. It is sometimes on the base of the range in front of the right front leveling leg. Pull the bottom drawer out to view this area. Newer Kenmore ranges sometimes have the model number at the bottom of the oven opening. Open the oven door and look down to view this area.