Which is the best wire to hook up to for my GPS? Light wire? Horn?
Good idea. I may do that, for now I just hooked it up to the battery and made a home made mount for it with $10.00 worth of parts from Lowes. It works great, just not adjustable but I can see it fine.I wired-up a spare SAE connector I bought at AutoZone to the GPS cable so I can just plug it into my battery charger's lead while it's on the bike. That way it's fused (inline with the charger lead) and when I need to charge the battery, I just unplug the GPS and plug in the charger. Fewer wires to mess around with and the only wiring I had to "modify" was the wiring on the SAE connector, not the wiring on my bike.