Newbie with rear wiper issue
 

I just bought a used 2006 Ascender. Only thing wrong so far is that the rear window wiper doesn't work for some reason. I assume all the wipers feed off the same circuitry so one fuse serves them all. The front wipers work fine. The rear wiper control, on the dash, does not respond to any setting.The washer for the rear wiper also does not respond. Suggestion welcome.

Did you have it fixed?