Patent ID: 6323651
Filing Date: 2001-11-27
Classification: G01R

Abstract:
An electrical and pneumatic diagnostic device for servicing the electrical and pneumatic systems of cargo hauling trailers comprising;(a) a housing member enclosing an electrical circuitry adapted for testing the electrical and pneumatic systems of cargo hauling trailers;(b) power supply means connectable to said electrical circuitry for supplying nominal 12 volt direct current thereto;(c) a first set of sub-circuits contained in said electrical circuitry, each sub-circuit of said first set serving a selected illumination and signaling lighting circuit of the trailer;(d) a second set of sub-circuits contained in said electrical circuitry, said sub-circuits of said second set for periodically actuating the pneumatic system of the trailer;(e) means for connecting said first set of sub-circuits to the trailer electrical system;(f) switch means for selectively powering said first set or said second set of sub-circuits;(g) said first set of sub-circuits each having control switch means for powering a corresponding trailer electrical circuit, and each having visual indicator means for denoting sub-circuit power;(h) conduit with a valve means for supplying compressed air to first and second fittings on said housing member, said first and second fittings adapted for connection to the trailer pneumatic braking system service and emergency hoses; and(i) said second set of sub-circuits containing timer circuit means for periodically actuating said valve means of said supply conduit, thereby actuating the trailer pneumatic braking system at selected time intervals.