S60FT H187V11120S
Has hyster tracker installed,
Horn is continuously on, Hyster Tracker counts down 8 seconds(does not say why) then cuts all power from key on(display and all power shuts off) will not turn back on until you disconnect battery and reconnect. No useful info in Tracker display except counting down to shutdown. I have PC service tool and only shows fault for horn which I believe is a byproduct of Tracker activating the horn. I am not familiar with Hyster Tracker and can not find any info on line, user/install or service manual for tracker. Does anyone have any manuals or info on this system???

CORRECTION: Countdown seems to be normal operation until its started, however has same issue with horn

Thanks