  A junction of two 2/3 fractional quantum Hall (FQH) edges, with no charge
tunneling between them, may exhibit Anderson localization of neutral modes.
Manifestations of such localization in transport properties of the junction are
explored. There are two competing localization channels, ``neutral-mode
superconductivity'' and ``neutral-mode backscattering''. Localization in any of
these channels leads to an effective theory of the junction that is
characteristic for FQH effect of bosons, with a minimal integer excitation
charge equal to two, and with elementary quasiparticle charge equal to 2/3.
These values can be measured by studying shot noise in tunneling experiments.
Under the assumption of ballistic transport in the arms connecting the junction
to contacts, the two-terminal conductance of the junction is found to be 4/3
for the former localization channel and 1/3 for the latter. The four-terminal
conductance matrix reveals in this regime a strong quantized drag between the
edges induced by neutral-mode localization. The two localization channels lead
to opposite signs of the drag conductance, equal to $\pm 1/4$, which can also
be interpreted as a special type of Andreev scattering. Coherent random
tunneling in arms of the device (which are segments of 2/3 edges) leads to
strong mesoscopic fluctuations of the conductance matrix. In the case of fully
equilibrated arms, transport via the junction is insensitive to neutral-mode
localization: The two-terminal conductance is quantized to 2/3 and the drag is
absent.
