My Truck Has 4 Pin Trailer Has 7 Pin

My Truck Has 4 Pin Trailer Has 7 Pin. You need to go to parts store or a department store (ex Wal Mart). First off I am renovating an older The plug wiring is universal for all vehicles.

7 Way Flat Pin Plug For Truck Trailer LED Light Wiring | eBay (Bernard Grant)

I can't get it to connect to any trailer. I had it display the info on my truck when hauling my car trailer. No power, for anything e.g brakes, turn, running lights.

I have a car trailer with interior lights that don't work.

First off I am renovating an older The plug wiring is universal for all vehicles.

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BUT, I wanted to make dead sure the truck isn't the problem (trailer is offsite right now). And if your truck doesn't have a trailer cord socket in the bed, now is the time to add one so the cord doesn't drape over the tailgate. Since then I have had the ground wire pull loose from the trailer twice.