Originally Posted by StmbtDave
Have a volt/ohm meter? Check the resistance on the grip. You'll have to separate the grip wiring from the switch before checking so you don't pick up the resistance from the good grip. Check at the switch end of the wire as well as right where the wires come out of the grip. If you get an open reading at the switch end of the wires but resistance at the grip, the grip is good but the wiring is bad. If open reading both locations, the grip is bad.
That is pretty much my plan the only real issue is accessing the wire where it enters these molded KTM grips.. they are sealed up pretty well. No worries; I'll skin 'em and then "liquid electrical tape" 'em.