jeep yj 1995

Hello everyone, we are working on my sister's YJ and here is everything going wrong... Initial issue was she kept blowing fuses for hazards and stop lights. Second issue was her instrument panel didn't light up when turning headlights on. Then the harness running up to the brake light switch...

Me. I am. Best at overturning bolts... My amazon torque wrench was an epic fail, I broke a bolt while replacing a valve cover gasket. Now there is a way for oil to leak out of the valve cover I think. Should I try a screw extractor, or is there a way just to "plug" this opening? Ideas? Wow...