I don't know much, but I do know that you can't use just a rheostat to control your heated grips. You can use an on-off switch and LED where you say, and then get a LED dimmer to mount somewhere else for the heat control. The LED dimmer is just a cheap way to get a PWM control. I've got one on my symtec heated grips, works great- ADVRonski did a little write up here in O.C. somewhere. Mount the pot where you can get to it, and remotely mount the rest of the circuitry- run the whole thing into the hi part of the grips, ignore the low circuit completely.