School bus and trailer systems tester

A school bus systems tester for performing safety checks on a school bus having illumination and signalling lighting circuits, the systems tester comprising:

• a cart having a housing attached thereto,
• electrical circuitry enclosed within said housing, and connectable to and selectively energizing and annunciating illumination and signalling lighting circuits of the school bus;
• said electrical circuitry having an electrical power supply and subcircuits, each serving a selected illumination and signalling lighting circuit;
• each said subcircuit having a switch for selectively controlling its respective subcircuit, an overcurrent protective device, and an annunciator selected from a lamp and an audible element responsive to successful energization of each said subcircuit;
• each said switch, said overcurrent protective device, and said annunciator being mounted on the exterior of said housing;
• and
• a seven-conductor modular wiring connector, whereby said school bus systems tester is compatible with a plurality of school buses, said modular wiring connector having a plurality of conductors, each individual conductor corresponding to one illumination and signalling function of said school bus, individual conductors for each like illumination and signalling function of each said modular wiring connector being connected in parallel by said electrical circuitry to a predetermined said subcircuit.

A systems tester for performing safety checks on trailers and school buses of the type having illumination and signalling lighting circuits, the system tester comprising:

• a cart having a housing, wheels supporting said cart, and a handle for maneuvering said cart;
• electrical circuitry enclosed within said housing, and connectable to and selectively energizing and annunciating illumination and signalling lighting circuits;
• said electrical circuitry having subcircuits, each serving a selected illumination and signalling lighting circuit;
• each said subcircuit having a switch for selectively controlling its respective subcircuit;
• an annunciator selected from a lamp and an audible element responsive to successful energization of each said subcircuit;
• and
• at least one seven-conductor modular wiring connector;
• wherein each of said modular wiring connectors has a plurality of conductors, each individual conductor corresponding to one illumination and signalling function, individual conductors for each like illumination and signalling function of each said modular wiring connector being connected in parallel by said electrical circuitry to a predetermined said subcircuit;
• whereby illumination and signalling functions are energized and tested on trailers or school buses having different modular wiring connectors by a designated one said subcircuit.