Put original post back up for followup info on what the cause was.Originally Posted by Teeg4 Original Post1B736923
2009 mercury 225 pro xs
I’m getting a “Horn Output” alarm on my smartcraft.
Previously I could turn the key on and get a quick tone and then another 2 second long tone around 2 seconds later. The letters ‘AL” would appear on my smartcraft display blinking in the top right corner. If I listened very carefully I could hear a very faint solid tone that was continuous coming from behind the switch panel.
Today I tried to find the root of this problem, I came across the alarm sensor (which is connected by a purple wire and a tan with blue stripe wire) and pulled it out slightly to get better access to it once I figured out that was where the solid faint tone was coming from. After I did this I turned the key off. When I turned the key back on I did not get a tone until 2 seconds later at which time I heard the approx 2 second long tone which I described as the 2nd tone I would hear described above. This is when I saw the “Horn Output” wording on the smartcraft display for the first time. Is it possible that this alarm sensor is bad or that I damaged it? I’ve already checked the wiring harness plug at the motor and all the pins seem to be clean and tight.
also to add, I changed from a lowrance HDs 5 unit to a lowrance HDS 9 gen 2 touch unit sometime back without changing out the power wire. The analog gauge that received signal from the smartcraft (trim, water pressure, speed needles) quit reading the speed signal and the needle would just sway back and forth while the other 2 were working. I’m not sure if this has anything to do with my problem above or not.
and...this is actually a new to me motor which I just had installed. All the problems I described above persisted with my old motor the same way...except that I’m not getting a trim signal to my gauge anymore with this new to me motor.
lots of things going on with this and I’m a little lost so any help would be appreciated.