I am looking to hard wire my gps unit to my bike. I have read a lot of threads and I am planning on putting in a fuse block with a relay. But what I want to do is cut the wire and plug off of my 110v charger and hard wire that into the fuse block, so I dont need to use the cig lighter charger. My gps unit calls for 5v so I am assuming that if I hooked it up to 12v that it would probably wreck something so I think I need a inline convertor from 12v to 5v but I have searched and can not find such a thing. Any advise would be appreciated.
Did your unit come with a line fuse? The easiest solution is to crimp a connector to the wire runs after a line fuse and go straight to the battery. If it didn't come with one I would look at your manual and see how many amps the fuse would need to be? I would guess 5a but would look it up to be safe. Radio shack probably has all you need to set it up this way.
I prefer this solution so that whenever it is on the bike, it will power up, regardless of ignition position. I like setting up my GPS on the bike before my ride. Having the GPS on while the key is off means my engine doesn't idle, or that my headlights won't drain the battery with engine off.
Where did you grab your relay power from? and also is that just a normal 12v socket under the seat coming off the box that you plug the car charger for the gps into?
The relay power 'switch' wire comes from the tag light. The GPS cigarette car charger plugs into a female adapter which I cut the alligator clips off and hooked up to the fuse box. I got it from Advance auto parts.
It looks like this:
The other wire coming off the fuse box goes to another outlet I added:
For use with my mini air compressor, heated clothing, charging laptop in side case etc..