a support tube including inter - folded legs is readily mounted upon a support surface , with a telescoping rod received within the tube . the upper terminal end of the rod includes a socket connection mounting rotatably therewithin a convex mirror for positioning rearwardly of a vehicle to permit an operator to visually observe operation of tail light assemblies of the vehicle . a modification of the invention includes signal alert apparatus removably mounted to the rod for use as an alert device during maintenance of vehicular light assemblies .