Robie,
Priming is not usually necessary. The lines probably are blocked by
dried windshield wiper fluid residue. First, try to free by using pins
or needles in the orifices of the spritzers at the windshield. Blow
through with your lips, too.  If "no go," then disconnect the ground of
the battery for safety. Under the left front, driver's side) fore of the
wheel, there are three bolts holding the tank to the frame.  Loosen
those bolts, hold the tank, and you can separate the motor from the tank
and check, open and irrigate, as necessary, to loosen the blockage.  Be
careful of breakage. The tank is probably dried out and the bolts may
shatter the plastic upon an attempt to reseat.  I used stainless steel
washers and strips of stainless steel to augment the bolts holding on
the broken edges of the tank.

Tom Hanlon
Palm Springs, CA
84 Westfalia

Robie Pierce wrote:
>
> I can hear the motor running, but no water comes out? Tank full. Had
> been empty for 2 months. Found the fill, at last. Do these pumps need to
> be primed? How do you get to to the lines & pump? Thanks for the help