its a bike specific unit, garmin 660 zumo, with a charging cradle so thing wiring it straight to the horn might be the most straight forward and about up to my ability. thanks guys. wont be doing it till sunday at the earliest so if anyone else has better advice please let me know.
It might work with the direct wiring to the battery. But I am not happy with that because the + 5 V pin of the charging cradle is always live and the voltage converter will draw a little current even without the nav installed. This current wil be only some mA but why should I stress the battery with that.
Just do what I do and unplug it when you've finished with it. Simples.
I fitted a plug to mine and it is connected via the Optimate charging socket under the seat.
don't worry about battery drain as you take the unit off when you leave the bike so no power drain
Quotedon't worry about battery drain as you take the unit off when you leave the bike so no power drainYou cannot generalize that. I have measured the cradle of my Zumo 660 and of my Zumo 500 without nav.With the 500 cradle the reading was 0 but with the 660 cradle 72,5 mA. Somtimes older stuff is better
I will never get my project bike, Pan euro st1100,