Why do the rear light fuses keep blowing on Dodge Durango?

Why do the rear light fuses keep blowing on Dodge Durango?

Since plugging in the inverter to charge my laptop the fuses for my rear lights keep blowing... the brake lights still work, but i just don't have any rear lights. The same has happened for my console, so at night I cannot see speedo or fuel guages etc. I am thinking it might be burnt wiring but what else can I try to repair it?