Windshield washer pump problem

[Guest]

My windshield washer pump stopped working. Because there was no activity from the pump, I thought I just needed a new pump. However, I checked the pump, lines and nozzles by hooking up the pump to a 9V battery, and everthing from there on appears to be working fine. When hooked to the battery, the washer fluid started spraying with no problems. So, it seems it must be something between the pump and the switch.

sometimes I think it's called "multifunction" switch because of all the different possibilities of problems you can face when it fails