I'd use a testlite on the bulb socket. At the rear socket, probably two terminals in the socket, one is for turn/brake not at the same time, the other is tailites. Use metal part of vehicle for testlite ground. Have helper turn on headlamp switch and step on brake, if both terminals in the socket are hot, I suspect a problem with the socket ground terminal.
Thursday, September 17th, 2009 AT 3:52 PM