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.

__________________
The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech