  Single $W_R$ production in $e^-e^-$ collisions at the NLC can be used to
probe the Majorana nature of the heavy neutrinos present in the Left-Right
Symmetric Model below the kinematic threshold for their direct production. For
colliders in the $\sqrt {s}=1-1.5$ TeV range, typical cross sections of order
$1-10 fb$ are obtained, depending on the specific choice of model parameters.
Backgrounds arising from Standard Model processes are shown to be small. This
analysis greatly extends the kinematic range of previous studies wherein the
production of an on-shell, like-sign pair of $W_R$'s at the NLC was considered.
