I'm having trouble diagnosing my 2014 Silverado z71 washer fluid pump power issue. I replaced the pump and checked the fuse. The fuse will not light the bulb when I test it (and yes, I did test it while the arm was depressed.). The wipers are working along with everything else. No pump sound either. Checked all of the interior fuses also. Confused now. Thanks in advance for the help.