Join Date: Jun 2008
Location: New York, NY, USA
The heated grips, like most of the electrical accessories, are controlled by the ZFE module, which is located on the forward right hand side of the bike under the big side panel. A good plan might be to get access to a GS 911 diagnostic tools to see if any error codes have been generated. It could be a short circuit in a switch, any of the wiring between the components, or a failure of the actual ZFE itself.
If you have a known bad heated grip, and that is because of an open or short circuit, the ZFE may not be able to control the circuit. Good luck.
2008 K1200GT, Custom Paint, Vivid Black, Aeroflow WS & Aeroguards, Givi E52 Maxia Topcase w/AdMore Lighting, Zumo 660, Suburban Footpeg Lowering, Sargent Seat
2009 R1200GS Adventure, Magnesium Grey/Black, Adventure Cases, Zumo 660, Touratech Unobtanium Accessories
1974 Norton Commando 850 Soon to be a restoration project