  We show that the associated production $pp\to W^{\prime}W$, and the rare
decay $pp\to W'\to \bar\ell\ell W$ are useful tests of $W'$ couplings to
fermions at future hadron colliders. For $M_{W'}\sim (1 - 3)$ TeV they would
allow a clean determination on whether the $W'$ couples to $V-A$ or $V+A$
currents. As an illustration a model in which the $W^{\prime\pm}$ couples only
to $V-A$ currents is contrasted to the left-right symmetric models which
involve $V+A$ currents.
