北美拖挂式的房车中，同步紧急刹车线是防止拖挂房车行驶当中与球脱离的防范措施，可以让房车紧急刹车，避免或减轻二次事故的发生。
特别需要注意这个紧急刹车控制盒是需要电池的支持的，在你拖挂房车上必须已经安装了12V电池，才能正常工作，起到紧急刹车的作用。所以需要定期做检查，是房车维护非常重要的一环。一般情况下，您可以自己来检测维护这个紧急刹车装置。
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Willum Skeener
检测维护这个紧急刹车装置
Our should never complain, complaining is a weak emotion, you got life, we breathing, we blessed. Surround yourself with angels. They never said winning was easy. Some people can’t handle success, I can. Look at the sunset, life is amazing, life is beautiful, life is what A federal government initiated report conducted by the.
- 在拖车和拖挂房车停下来的情况下，从拖车上拔下拖挂房车线束插头（trailer harness plug）。
- 将销（the pin）从分离式紧急开关中拔出，这可能需要一点力…… 大约35英磅力气或更多。
- 向前拉拖挂房车 — 制动蹄与制动鼓接触需要向前运动，迫使制动蹄将制动蹄楔在旋转的制动鼓上，同时制动鼓试图将制动蹄与制动鼓一起拉动。这种动作就是制动蹄更紧地拉向制动鼓，从而增加了制动力。
- 继续尝试向前移动，拖挂房车应该不会再随意向前移动。如果拖挂房车容易向前移动，则制动系统有问题，而不一定是分离开关本身。
- 如果通过这样分离测试，则将插针重新插入分离开关，然后将拖车线束重新插入拖车的插座。
如果拖挂房车未有通过测试，则需要对整个系统进行诊断，并且在调整或修理制动器之前，不要拖曳拖挂房车，可能要请拖车公司拖到房车修理点去维修了。
建议初级使用拖挂式房车者最好定期去房车维修点维护。
北美拖挂式的房车维护细节
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