I am trying to help my boss out with his 99 XK8. It fails the OBDII test. I don't have the paper handy, but it's throwing codes for the O2 sensors heater voltage on all the sensors. I checked the fuse in the engine compt on the Pass side and thats good. Everything else on that circuit works. (A/C clutch, etc.)

Also, the outside mirror adjustment switch will not move either mirror. May or may not be related.

If anyone has a diagram of the O2 sensor circuit that would be helpful. I'll post the codes when I dig up the test results.
Any help would be greatly appreciated. Thanks!
Andrew