Bad pump, no fluid, plugged line, broken line, bad switch, blown fuse, wiring problem.
most likely the fuse is blown
need windshield washer motor
The hoses on the washer fluid pump motor are in the wrong locations. On the bottom of the washer fluid bottle, there is a pump. Swap the rubber hoses and it should work properly.
In relation to the washer fluid, check if the fluid tube is not twisted or blocked in anyway.
Check the washer fluid pickup screen and/or pump.
Does the washer not work at all, or does it just not work when it's trying to rinse? It may be a lid switch. If the washer does not work at all, it may be the timer. Pull the timer from the unit and check to see if any of the "fingers" are stuck, sticking, or burnt. If so, change it. The timer is the "Brains" of the washer... it tells it when to start, cycle, & stop. Sounds to me like this is more than likely your problem. The washer allowed water to be drawn in and then went to "L".
If it now works it could be a bad connection to the sprayers.
If Your Question Is That You Are Not Getting Much Water Onto The Windshield. Look For The Screen To Be Partially Stopped Up In The Washer Fluid Tank Or The Hose. Also You Could Have A Small Hole In The Line Not Allowing The Unit To Pull The Fluid To The Wipers.
Yes its possible that the motor can suffer moisture damage especially the brushes which are made of carbon.
What would cause a headlight not to work on a Corsa SXI
I don't know unless the pump is bad. I have a 98 XLT that the front washer doesn't work but the back one does. So it's not the pump since the same pump is used for the front and back. It may be the switch, GEM, or a relay... but I'm not smart enough to troubleshooting.
Any brand washer fluid will work.