I have completed my 12v power supply for small accessories. I use it to power my GPS.
I picked up a weatherproof 12v powerpoint (cig lighter socket) at walmart. It has a flat side and tywraped under the center of the handle bars. It strapped on easily,and I rode with it a couple of days before I wired it in, to ensure there would be no issues with the location.
To wire it up I used crimp connectors, a buss fuse holder (the cheap round style), #18 stranded auto wire, shrink wrap and liquid tape.
1) Ran 2 wires from the handle bars under the tank and under the seat. The - wire will drop down to the - terminal of the battery so left lots of extra and cut. The + wire will drop down into the tool storage compartment so again left lots of extra and cut.
2) Used crimp on butt connectors to connect the 2 wires from the power point to the 2 wires I just ran. I have a proper crimper to do this. I have found that this works the best to ensure a proper connection that doesn't pull apart. Be sure to slide the shrink wrap on the wires before you crimp the connections.
Once crimped I coated the connections with liquid tape. Just enough to seal them up. Once that had set I slid up the shrink wrap, heated it and voila, a weatherproof connection.
4) I used a multi meter to figure out which wire sb the +. The centre point on the 12v supply is + so I made sure the wire connected to this dropped to the tool storage area which is the + side of the battery.
3) Disconnect the battery. Cut the - wire to length, I left a generous loop under the seat just incase. Crimp on a terminal to the - Wire. I also used liqiud tape & shrink wrap in this.
4) Crimp on a terminal connector to one side of the buss fuse holder. I chose the side that doesn't expose any live wiring when its pulled apart. Seal & shrink wrap the connection
Butt connect the + wire to the remaining side of the fuse holder. Seal & shrink wrap.
Hook up the - terminal and - wire connector up to the - side of the battery.
Hook up the + terminal & fuse holder to the + side of the battery. Put a fuse in the fuse holder.
Everything worked ok so I finished up tywraping the wires to existing stuff and put all the parts back o the bike.
It's been 1 week, 600 miles and 1 horendus hail storm ( Me and the bike got drenched) and no issues.
I wonder if the bike can provide eought power for aheated vest?
Here's a lik to some pics of the install:
http://www.bikepics.com/members/mkram69/p2/