13 F450 factory trailer harness nothin but markers

superdutypowerd

New member
Joined
Nov 2, 2013
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80
Build new hitch under truck. Everything worked before hand. Cut rear plug out to install plate. When I put plug back in, truck no longer puts out trailer stop/turn signal either side an factory brake box does "acknowledge" trailer presence. All fuses are good. Symptom is at both trailer plug locations. Gooseneck & bumper. :bang
 
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