Hi, was wondering if anyone else had this problem with a 2017 F150. My truck horn came on by it self as the truck was in park and engine off. I disconnected the battery and waited a few seconds but it came back on as soon as I started the truck. Finally disconnected the horn. Any advice or help appreciated. It has less than 30 thousand so I will take it to the dealer.

 

Check the horn relay for a malfunction, #75 in the BJB. Swap it for another and see if the problem goes away.

 

Hi 52merc, sorry it took so long to respond but you were spot on. That was the problem and the dealer took of it. Thank you.

 

Thanks for letting us know.