| 1. Check up all external illumination and a sound signal. |
| 2. Visually check up all accessible electric sockets, plaits of wires and скобы fastenings of plaits of wires. |
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3. If any separate bulb of external illumination, probably does not burn, the bulb has fused and it is necessary to replace it. If both bulbs of stoplights, probably do not burn, the switch of stoplights has failed. |
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4. If some bulbs, that, probably simultaneously do not burn, there is a damage to an electric feed circuit of bulbs or has fused the fuse. |
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