I’ve got a 2010 V. I just installed Kimpex-style grip heaters (actually from Aerostich). I already have the OEM relay/5A charging socket, so I tapped them into that. So far so good, and no need to run a separate line to the battery.
Getting the factory grips off/on was easy: just work a wire coat-hanger between the grip and the bars/throttle tube and pour/squirt in a little bit of rubbing alcohol. The grips slip off without any trouble.
I wrapped a layer of electrical tape on the left side before sticking on the heating pad (maybe it'll help keep the bars becoming such a heat sink?), and secured both with more electrical tape. Then I used a little bit of rubbing alcohol on the inside of the grips before installing them; they slipped on without any help.
The black/yellow stripe wire is the ground; use a female bullet connector. White/blue (?) stripe is positive; use a male bullet connector, which plugs into a dual female connector shared with the 5A socket.
No need for a separate relay; the acc relay switches on both the accessory plug and the grip heaters.
UPDATE: Wow! Cool! Warm hands! The Kimpex/Aerostich kit comes with the ugliest switch I've ever seen (which I mounted through a hole in the filler space to the left of the instrument panel), but it's simple and it works. But it's ugly, so it's probably destined to be replaced with something a little less ugly. And maybe a little more water-resistant. (And less ugly.)
Last edited by Sturmeyhack; 01-02-2019 at 02:26 PM.
Reason: Additional words and such.