Patent ID: 7476013

Claim:
A vehicle light bar comprising: a housing, where the housing extends substantially across a roof of the vehicle, the housing (1) having a front and a back that include lenses for transmitting light from an interior of the housing and (2) containing one or more circuit boards each having a planar surface extending between the front and the back; each of the circuit boards having patterns of keys in its surface that complement patterns of keys in two or more light beam assemblies so as to register the fastening of the two or more light beam assemblies to the circuit board at predetermined positions; each of the patterns of keys in the circuit board are associated with electrical connections leading to one or more connectors on the circuit board so as to provide an electrical connection between the one or more connectors and one of the two or more light beam assemblies mated to the circuit board at one of the predetermined positions defined by the pattern; and the housing including components of fasteners complementing components of fasteners in each of the circuit boards such that engagement of the complementing components registers the circuit board to the housing so that the two or more light beam assemblies fastened to the circuit board are automatically aligned with one or more lenses in the housing.