Rear window won't roll up only down. Where do I go from here?

what if you use the master switch for the driver same thing , there might be an electronic module , a little white box , that controls the power , if you have a multi tester you can see what's getting power and what's not , those can be expensive (modules) so try a salvage yard

If you have power at motor,switch probably failed.

I can add if you find that the module is bad that you should look for shorts or the problem that caused it to fail before you install a new one so that one doesn't get burnt too

Replace master window switch! Thats the answer if window only go down!