trunk light not working

hello guys.... since last week my trunk light stopped working and, i really need it.. cuz i load small boxes everyday and, i need the lighting late at night.. Iv been using a flash light lol... I tried replacing the bulb but its not working. What else can it be ???

broken wire /bad switch bad ground

it makes sense but i have no idea where the switch would be.... can somone tell me where the switch would be located..???

thanks