Relay module, electrical center having a relay module and method of assemblying the same

An electrical center includes a housing and a relay module that is disposed in a well of the housing. The relay module has a lower base, a printed circuit board assembly, plug in electronic components and a cover. The lower base includes a tray having a depending shroud at one end portion and a pair of laterally spaced couplers that are integrally attached to an end wall of the tray. The end portion of the tray that has the depending shroud has a plurality of apertures that extend through the end portion of the tray for receiving terminal portions that extend through the apertures. An opposite end portion of the tray has an upper pedestal that is part of a connector body that extends through the tray to a lower socket. The printed circuit board assembly has a printed circuit board that is attached to the top of the tray near a side edge, a plurality of relays that are attached to an upper portion of the printed circuit board. The relays are electrically connected to a plurality of terminals that are disposed beneath the relays. These terminals have portions that plug into the apertures and terminate in free ends disposed inside the shroud. The relay module also includes plug in electronic components that are plugged into the end portion of tray so that their metal terminal tabs extend through the apertures and into the space inside the shroud. The relay module also includes a main relay that is mounted on the pedestal for electrical connection to a wiring harness that plugs into the lower socket of the connector body. The relay module is retained in the well of the housing by an internal lock bar that engages the couplers at one end and an internal lock nib that engages a flexible lock arm of the relay module the other end.