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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Im sure there is a fuse for it but Im also sure it is not a dedicated fuse for JUST the horn. It likely may cover other circuits. But Im not totally sure being you have a later model and I dont have my DR Srvc Manuals in front of me. The best thing to do is pull the headlight or go from under the truck. As for the fuse, take the PDC cover off and look on the under side of the cover and see what fuse is for the horn.
whilst installing my BL i had my brother turning my wheel slightly to straiten up the slot where the pinch bolt goes. He overdid it lol. Broke the ribbon in my clockspring, so the horn was honking at full lock.
Until the clockspring comes in i am fixing the problem, because i cant have the honking with every right turn lol