Hope someone can advise. Bought another truck ( 09 sierra) when i plug boat trailer up only thing works is drivers side brake light and turn signal. no other lights anywhere. Thinking truck wiring plug (factory)but not sure. Man i bought it from said he never had problem. i am using adapter from previous truck(ford) but can not see that being issue. It is hot or the 1 brake light and turn signal would not work. Never had issue with adapter on previous truck. fixing to order adapter just not sure if problem will be solved. Any advice/help appreciated. thanks