1) I assume there is power. It went out yesterday when my daughter was blow drying her hair. All outlets in the upper level bathrooms are now out. I hooked up the 2 black wires to the 2 brass screws and the 2 white wires to the 2 silver screws. Also connected the ground wire. The yellow test light is working but it will not reset.
Not all voltage meters will work on 120v. You can go to a Home Depot or similar and get anIdeal Vol-Test Voltage Tester Model # XXXXX Store SKU # XXXXX for about $20. This will let you determine the correct pair for line & load.
Gardner Bender Ground Fault Indicator Tester; 1/Cd, 10Cds/Master
Model # XXXXX Store SKU # XXXXX
You would plug this in to the outlet and you then would move the wires from one screw to the other to get the correct combination.