| 摘要 |
<p>A portable diagnostic device for checking electrical signalling systems of road going trailers. The device has several receptacles for connection to a corresponding receptacle or pin connector of most types of trailers (20, 22, 39, 90, 92). An electrical circuit includes switches for energizing individual signalling or illumination circuits of the trailer individually, and indicating lamps for annunciating circuit operability. The device, which is contained on a wheeled cart, has its own power supply (34) and circuit overcurrent protective devices, and is thus independent of a tractor which normally generates the signals. Pumps for generating pneumatic and hydraulic pressure are provided for monitoring integrity of these systems of a trailer. Auxiliary electrical systems, such as electric brakes, can also be monitored. The device enables a shop to perform a safety check for many varieties of trailers, while remaining independent of the tractor vehicles associated with the trailers.</p> |
