Originally Posted by
vickie pauley
I put a new battery in my trunk f-150 and the horn keeps going off if you open the door.we took outthe fuse for the horn and now the flashers blink .please help the guy who put the new one in took some thing off and said it was a add on alarm but it is off .please help me if you can't be nice don't say anything.
Probably the flashers were also blinking when the horn was blowing but you just didn't notice. These are both functions commonly controlled by an alarm system.
My guess would be that something needs to be reinitialized on the alarm system. It probably has some type of internal battery that will keep it in a powered state even if someone messes with the vehicle power (like disconnecting the battery).
I suggest you find the model # of the alarm and search on line for a manual if you don't already have one. It will likely give you some info on resetting the system, or take it to an installer, they probably know what to do without even looking it up.