Control bulb of indexes of turn on the trailer
It rhythmically flashes if at the connected lighting of the trailer the corresponding lamp of the index of turn on the trailer functions. If the lamp of the index of turn on the trailer is faulty, then the control bulb does not blink at each turn. It also does not blink – as it was found earlier – at inclusion of the index of turn. However: at the included system of the alarm system and the connected lighting of the trailer the control bulb flashes if one of lamps of the index of turn does not work at the trailer.
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