Abstract: An apparatus (16) for diagnosing faults in the electrical circuit of a motor vehicle which has a microprocessor (90) connected to a wiring harness (10) of a vehicle for controlling selected operations of the vehicle as a diagnostic microprocessor (22) which is coupled to the vehicle microprocessor (90) and wiring harness (10) by way of a multipin connector (14) and either an autotest circuit (44) or a manual breakout box (42) and reference probe (18). The microprocessor (22) also has a further test probe (20) for connection to the various terminals in the wiring harness (10). A plugin module (28) stores information particular to the vehicle and the test and the diagnostic microprocessor (22) monitors the vehicle microprocessor (90) and interprets any fault signals received from this using the information in the plugin module (28) to carry out a diagnostic test of the vehicle wiring harness (10) to locate the fault.

Abstract: A wheel alignment gauge comprising a pair of beams, each adapted to be mounted on or located against a different one of a pair of vehicle wheels or axles for such wheels, each of the beams is provided with a pivoted arm at an end of the beam which projects beyond the outer circumference of the wheel and the arms are interconnected by an elastic link, each of said arms is provided with read-out means to give an indication of the angular position of the arm relative to the beams, and thereby of the angular mis-alignment (toe angle) between the plane of rotation of the vehicle wheels or plane of rotation about the axles for the wheels; the read-out means being adjustable relative to the associated pivoted arm in order to allow for the steering angle at which the "toe out on turns" of the wheel is measured and provide an accurate direct reading gauge.