We present in this work the experimental results of shear stress applied to a rough metallic interface. This interface was test using a weak DC current, measures of the voltage evolution were done on each end of the system while an increasing shear stress was applied. From these measurements we deduce the evolution of the interface electrical resistance to attempt to highlight the contact area evolution. Results show that the interface resistance follows a non-monotonic behavior: it first increases to a maximum and then decreases until the contact breaks. The evolution of the interface resistance is related to the evolution of the contact area, the non-monotonic behavior is interpreted as different deformation regimes in the spots of contact.