  We consider the production of a pair of like-sign charged Higgs bosons in
$e^-e^-$ collisions at the NLC within the context of several electroweak models
with extended symmetry breaking sectors. We find that the rate for this
process, which proceeds through $W^-W^-$ fusion, is a very sensitive probe of
the nature of these extended Higgs sectors and that the corresponding cross
sections can vary by as much as several orders of magnitude at NLC energies.
(Talk presented at the Santa Cruz Workshop on $e^-e^-$ Physics at the NLC,
University of California, Santa Cruz, September 4-5, 1995.)
