Went outside to add another electrical circuit at the BBQ and discovered that all of my nice wire-tagging had faded to non-readable.
So I couldn't figure out which common went with which hot.
Then it dawned on me to simply trip the GFCIs which releases *both* hots and commons so a simple ohm-meter check would do the trick.
NOT! Both GFCIs wouldn't trip when I pressed the test buttons :-(
Went to Radio Shack and bought a Receptacle/GFCI tester for $5.99.
At the same time I noticed a gadget to locate breakers... bought it also ($29.95).
Went home and tested the GFCIs... both have failed :-( Tester was verified on some indoor GFCIs... it would trip them.
Both bad units are outdoors, so maybe it was the heat (they both face the western sun... it gets over 120°F here :-). Any other ideas about why they fail?
The breaker locator is neat... plug a sender unit into an outlet, then scan the breakers... works like a champ.
...Jim Thompson