Triplett WireMaster Mapper Instruction Manual - page 12
12
At the ends of the target cables opposite the Remotes, connect
the WireMaster Mapper, in succession, to each cable, noting the
ID number of the LED that lights.
If upon connecting the WireMaster Mapper to a cable, the OPEN
LED remains lit, the cable may not have a Remote at its opposite
end, an open fault may be present in the cable, or a splitter or
some other device may be present in the cable. The WireMaster
Mapper will not work through splitters, amplifiers, or any other
DC blocking devices.
If the SHORT / CONTINUITY LED lights and the beeper sounds,
the cable may be shorted, or some device is connected to the
cable that appears as a short to the WireMaster Mapper.
If the OVERLOAD / VOLTAGE LED lights and the beeper sounds,
at any time, the cable being tested has voltage on it and cannot be
ID’ed.
If a number of ID LEDs light simultaneously, a stray voltage may
be present that will prevent the cable from being ID’ed.
Most non-faulted cables containing 2 conductors or more can be
mapped. Even single conductors can be mapped if a low resis-
tance ground or return path is available.