Tests for a weak neutral current in high-energy inclusive l±−N scattering are discussed, where l is a charged lepton and N a nucleon. If the polarization of the incoming lepton of the target nucleon can be varied, or the outgoing lepton's polarization observed, an unambiguous measurable consequence of such a current is parity violation. Some general expressions for parity-violating correlations are derived, and their magnitude in particular models is calculated. Further consequences of such a current are (i) a difference between l−−N and l+−N cross sections and (ii) a deviation of the l−−N cross section from the form implied by one-photon exchange only. Tests for these effects are similarly examined, but an accurate knowledge of higher-order electromagnetic contributions to them is necessary before such tests can be implemented.