My name is Peter. I am retired field service appliance technician.
Your oven requires a special oven utility bulb. If you have used common house hold bulbs they can not handle the heat.
Lets assume you did use a special utility bulb. On the face of your oven when you open the door is a little plunger button (Switch). This is may be a dual activation switch if you have a self cleaning feature. So, you will have either one circuit for the light or two circuits, one for self cleaning and one for the light.
The circuit for the light is a separate circuit and is strictly for the light to turn on when you open the door and turn off when you close the door. You can operate your oven safely without the light working.
You may have a short, but I will bet on a bad oven door switch.
Go into the following website and put in your model number. You will get diagrams and component part numbers.
Your model number is located on a label either on the face of the oven when you open the oven door or on the side of the door. Water Filters Lawn Garden Appliance Parts