Electrical auxiliary equipment for vehicles with trouble point self-diagnostic function

摘要

In an electrical auxiliary equipment (100; 200) for vehicles, which has a trouble point self-diagnostic function and includes a display unit (10) for indicating the condition of operation of the auxiliary equipment, there is provided a system for driving the display unit (10) to indicate a troubling point when, among a plurality of operation switches (51 to 53, 60 to 65) provided for the equipment, at least two (60, 61) are operated substantially in a concurrent manner.