Abstract: A probe block assembly has an electrically insulative housing and an electrically conductive plate. The front side of the housing has a forward face and a recessed face. The electrically conductive plate is positioned against the recessed face of the housing. A plurality of probes extend from the forward face of the housing and are electrically isolated from each other and from the conductive plate. A plurality of probes extend from a front surface of the conductive plate and are in electrical contact with each other.