Windshield Wiper fluid not working

Question by caheron posted 3 months 3 weeks ago in M-Class

Windshield wiper fluid not working front ~ replaced pump and reservoir now when pulling back on wiper they don't work but if I unplug it the wipers work.   plug it back in they don't work and no fluid.  Wipers work in up position ?  Check fuse ~ looks good could it be the relay or ?   Help please