Check the electric switch after everything is ok, then put out the lamp, went to bed.
检查电器开关都一切正常后，便熄灯，上床睡觉了。
2
Confirm connecting ok then fix the light body and electrify to test function, Reading lamp and head lamp lighten when open the car door.
确认接线无误固定好灯体即可通电试功能，开门时阅读灯和照明灯应亮。
3
But for something, like bike, lamp or something like this, it is OK. honestly, sometimes, I even found I became addict to second-hand stuff. The full process is interesting.