On Sun, 14 Jul 2019 02:14:37 -0700 (PDT), wrote:

Assessment lose connection or broken wire
[...] What should be the step by step process
to find where the fault is in path from Breaker

Well, start with the most likely, i.e. connections at GFCI. You don't need
to break any tiles for this. Remove the old GFCI. Disconnect all 3 wires
from the other end at the breaker / fuse box. Use an ohm-meter on all 3
wires. (Will require an additional test wire from box to kitchen.)

Note: To protect ohm-meter, check for voltage before checking for
continuity. There should be no voltage.

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