A diagnostic device adapted to retain a fluid sample to be analyzed until it is desired to initiate the analytical test is described. A plurality of slats are connected with each other and connected between the top and bottom rail. The LED is mounted on a high heat conductivity base and is connected to an applied power supply through a circuit board. The first and second sections of the body are preferably composed of flexible, incompressible materials. The signal is thus not disrupted by noise. The bracket has a primary attachment point and a secondary attachment point for supporting the interior trim component.