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the pump is controlled by a blue and yellow wire. These are two of the three wires that operate your wipers...
So test the yellow wire for power, the blue wire is your ground. When you push in on the switch to make the washer go, it also fires up the wiper motor.
I tested the wire with a multimeter and it shows 12V when pushed in. The pump is probably the original and is shot -- thus I ordered a new pump.
It is difficult to remove the washer fluid reservoir to replace the pump? It looks like it would come out without removing surroundings - albeit a tight fit.