VEHICLE ELECTRICAL CIRCUIT FAILURE MONITOR

摘要

The invention concerns an apparatus for monitoring the operation of electrical circuits on a vehicle trailer (10), and has a monitoring unit (18) including a monitor circuit (32) for outputting a signal in response to failure of a component such as a lamp (12a - 12d) of a trailer electrical circuit. The monitoring unit also has a transmitter (34) for passing a failure indication signal to a receiver (90) of an indicator unit (26) which is mounted in a towing vehicle (14) in a position where it can give an indication of failure of the component to the vehicle driver.