Originally Posted by jay_bob

Unfortunately all that will tell you is that you have at least one good wire.

The only real way to check is power up and do an IR scan. Unfortunately not everyone has one of those in their back pocket...maybe soon the price on those will come down to where they are commonly affordable.

Only other thing I can think of is that you will get a magnetic field around each conductor, and only the lines with continuity will pass current and thus generate a field about that line. May have to do an experiment with a compass and see if it is capable of detecting the field in each grid line and resolve to tell if a line is carrying or not. Or maybe a Hall effect sensor.