A tripped GFCI will open the hot and neutral lead of downstream outlets.
To check for both being open you need a known good hot connection [supposed to be the short slot of an outlet] and a known good neutral/ground [outlet long slot or round hole] and a lamp and Alligator Clip Leads.
To check for both being open you need a known good hot connection [supposed to be the short slot of an outlet] and a known good neutral/ground [outlet long slot or round hole] and a lamp and Alligator Clip Leads.
