upnorth Posted July 19, 2012 Share Posted July 19, 2012 Here is the story. We have 5th wheel and I had to change the 7 pin because it was a little long and one time slipped out of the jury rigged method I had to hold it off the ground. I replaced it and realized that the tails lights don't work. Truth is we never towed it at night and never had a reason to check to see if they worked. I have checked and rechecked the wiring and it is all good by the book. I have tried the 7 pin in both my 3/4 ton and my wifes trail blazer and neither work. I have also traced the wire for the tail lights and ran power directly to that and the tail lights etc then it works fine. I tried running power from the tail lights to the other side of the where the 7 pin plugs into and the tails lights come on, but then the right side blinker doesn't work.I did notice the yellow wire on the RV side doesn't exist and it was cut back on the old 7 pin. Like I mentioned earlier I am not sure if the tail lights ever really worked. Anyone got any ideas? Quote Link to comment Share on other sites More sharing options...
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