for do it yourself automotive repair see the picture to the right for a wiring diagram of seven way vehicle end trailer connector if you click on it you can enlarge it i have also included a trailer wiring faq page for you to check out i have a 2006 chevy suburban equipted w a trailer package i have the wiring harness to install on to my tekonsha voyager brake controller the problem i have is there are 5 wires on the wiring harness and only 4 on the controller finding the dodge lil red express truck parts that you need is easy with uneedapart s convenient locator service when you run your own automotive repair business time is money