The left wire for the RGU heated grip plugs into harness P/N 69201599. The plug should be located under the seat in front of the battery tray. Not any more difficult, just a bit more time consuming removing the wire from under the tank and seat vs the RGS where it plugs into a conveniently located plug in the instrument cluster. If your grip wire is internally wired, yeah you’re gonna have to fish it through. If it’s externally wired, watch some YouTube videos on how to convert it to internal wiring. Cleaner look. If it were me, I’d remove the tank and run the wire thru the harness tray along the backbone, and them plug under the seat, but that’s just me.
Here’s a few tips if you haven’t done it before. Remove the main fuse. Take pictures of how the wires are run under the clam shells. It’s specific, and common to screw it up and throw a code because you ran it differently and pinched it under the clam shell. Lube the wires with soapy water, or wire lube. Once all wired back up, check, then double check the plugs are inserted all the way. Check your wires for damage. Sometimes the slightest scrape, and a bare wire will cause issues. Put your fuse back in, turn the bike on, check turn signals brake lights etc., making sure you’re not throwing any codes BEFORE you tighten everything to specs and button it up. If anything doesn’t work properly (cruise control is another common indicator you have a loose wire or plug) you’re gonna have to take it all apart and find the issue. Throwing codes after DIY handlebar installs is a recurring theme because of the aforementioned. Good luck!
One last thing. Careful with removing right grip. Easy to break the front brake switch nipple. Put a piece of cardboard creating at least 1/8”space between the lever, or just be extremely careful when removing or inserting the lever. If you have to force it, you’re doing it wrong. Wouldn’t hurt to own or borrow a manual.
Last edited by BlazingSaddle; 08-30-2018 at 11:12 PM.