很可能是brake switch 坏了。这两个毛病相关，先从简单的，即switch下手。

所有跟帖： 

• thanks. yeah, i googled and some people claimed the problem is g -ymmud- ♀ (0 bytes) () 04/18/2013 postreply 18:59:22

• 刹车尾灯左边有一个灯烧了，但是换了个灯泡还是不亮，估计是控制的电路有问题 -ymmud- ♀ (61 bytes) () 04/18/2013 postreply 19:02:57

• most likely it's contact issue, not board -giddyup- ♂ (113 bytes) () 04/18/2013 postreply 19:31:51

• thanks. will do that. -ymmud- ♀ (0 bytes) () 04/18/2013 postreply 20:02:01

• 谢谢，brake switch一般在啥地方 -ymmud- ♀ (0 bytes) () 04/18/2013 postreply 21:12:34