| 摘要 |
An electrical system for a road vehicle has a pair of electrical loads, a plurality of switches controlling the loads respectively, a plurality of feed lines, means whereby each switch when operated energizes two or more feed lines in a unique manner, switching means sensitive to the way in which the feed lines are energized for switching the loads on and off under the control of their respective switches, and at least one instrument on the vehicle. The instrument has a reading which is determined by a variable resistor in some other part of the vehicle, and in accordance with the invention it is found possible to make the connection between the instrument and resistor through one of the feed lines.
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