Surdel....

There is a tool that you can use to short out the pairs one by one.
Not what it was designed for, but if you use the QTBIX17A and clip the clips together, it would short them out, then use a regulat toner or ohm meter at the other end.

Here's a Link

Once you go BIX, you'll never go back!

Scientists say that the universe is made up of Protons, Neutron & Electrons. They forgot "Morons".
Dave. (CTUB) Canadian Techs Use Bix!