heated hand grips right side inop

[Bigfoot]

Upon returning from my cross country this summer my right side hand grip stopped heating but the left is still working. I took the right side off and checked the wireing and saw no breakage. Any ideas on how to check for any breaks or any common problems that may cause this? or should I try and buy a new right side grip?.....anybody got an extra right side layig around?
Thanks Bigfoot

 

[Mike Sands]

I managed to nip the cable when I replaced a mirror. Worked fine for a few hundred miles then blew some fuses.
Mike