Abstract: An apparatus and method for aiming a vehicle headlight to a standard image pattern includes a frame movable relative to the vehicle. A housing carried on a vertically adjustable housing includes a lens focusing a headlight beam onto a reflective screen which reflects the beam image to a camera. A control compares the digitized image output from the camera with a standard image pattern and generates a correlation factor based on the difference between the reflected image and a standard image. Based on the difference, the control generates output signals to an adjustment device engagable with the headlight mounting frame to adjust the position of the mounting frame to reduce the difference to zero.

Abstract: An apparatus for longitudinally centering the front and rear pairs of vehicle wheels includes a frame having pairs of laterally movable tables, each for receiving one of the vehicle wheels. Pusher members are engageable with each vehicle wheel. A centering mechanism is connected to the pusher members and normally biases the pusher members laterally outward such that laterally inward movement of one of the pusher members due to engagement with an off center vehicle will be resisted by the centering apparatus which will in turn urge the pusher members laterally outward moving the vehicle wheels and the tables laterally outward to a longitudinally centered position. Preferably separate pairs of tables, pusher members and a centering mechanism are provided for each of the front and rear pairs of vehicle wheels.

Abstract: An apparatus and method for aiming a vehicle headlight to a standard image pattern includes a frame movable relative to the vehicle. A housing carried on a vertically adjustable housing includes a lens focusing a headlight beam onto a reflective screen which reflects the beam image to a camera. A control compares the digitized image output from the camera with a standard image pattern and generates a correlation factor based on the difference between the reflected image and a standard image. Based on the difference, the control generates output signals to an adjustment device engagable with the headlight mounting frame to adjust the position of the mounting frame to reduce the difference to zero.