Hi Vaden,
As others have said, it's usually the 12V DC Mini-circuit-breaker near the battery. Takes 10 minutes to replace and costs $5-15 depending on where you buy it. Get an auto-reset breaker, 50 amp, same form factor so it fits on the buss bar.
There's probably a red rubber boot covering the breakers. Here a picture. Your buss bar may look a bit different, but look for the heavy wires, using the example below to guide you.