I had same problem.......drivers side not working but passenger side ok. Check fuse 1st, its same fuse that controls elec mirrors , reverse lights & air con. Switch next..., u shud be able to hear a relay click from door as u toggle the switch, if yes then u obv have power to switch and relay, if not swap passenger door switch and link up to see if switch is prob. As mentioned above u can pull rubber door grommet out to inspect wire condition as prone to splitting and thus earthing/shorting. I did all of above without sucess until i removed door skin (1/2 hr job with Haynes manual), unplug