[wright.hamilton]

installed a new leviton triplex outlet on one side of my kitchen(works great).installed one on other side which didn't work.i re-installed old outlet
and now it doesn't work either

 

[220/221]

1.You might have tripped the GFCI recep.

Possibly by using a tester hot to ground????

2. You might have a bad connection in the second one you installed (it may feed the first one)

 

[Speedy Petey]

1.You might have tripped the GFCI recep.

+1 :thumbsup:

 

[Yoyizit]

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.