Had something like this happen with my wifes truck, check the wiring to the trailer connection. If you don't find any crossed wires make each wire and then disconnect each one. This will rule out if the wires ar hooked up wrong. If you find out that this is still happening somewhere. With the trailer on had this happened before? What kind of connection do you have a round plug or a flat 4 wire plug?
Friday, August 24th, 2007 AT 10:15 PM