Will this pump work with my existing washer hoses and fluid reservoir?

Yes. This pump uses the same connection points and internal threads as the factory unit, so all original hoses bolt straight on with no adapters or modifications needed.

Do I need to drain the reservoir before swapping out the old pump?

You can either drain it first or work around the fluid—depends on your comfort level. If you leave fluid in, lay cardboard underneath and let gravity do the work. Either way takes under 10 minutes once you disconnect the power and hose.

What if the pump doesn't spray after I install it?

Check that power is reaching the motor (listen for a faint hum when you hit the spray button) and confirm the intake port inside the reservoir isn't clogged with debris. If power isn't there, verify the electrical connector seated fully. Air in the line is normal the first spray or two.