Transport currents in one leg of a cross strip superconducting‐normal metal‐superconducting Josephson junction have been used to bias the current‐voltage characteristics of the junction, and hence use the junction as a control element. The bias current creates a magnetic field in the junction, which in turn modulates the Josephson currents. As the bias current causes successive flux quanta to enter the junction, the Josephson critical current shows current‐voltage curves similar to the resistively shunted junction model and a normal Fraunhofer pattern. Values of the bias are relatively small because the junctions are so thick. A detailed study of the junction voltage as a function of bias current shows reentrant superconductivity as successive vortices enter the junction.