I agree wholeheartedly with Alistair.  In about 1999, the water pump on my
Vanagon quit working.  I pulled it, poured a little vinegar in the opening
by the impeller and let it sit, turned the impeller, flushed it out, and it
has worked perfectly ever since.  Since your van has sat up for a long
period having the painting done, the rebuilt motor adventure, etc. the hard
water in our area could have left some deposits in the pump.

Good luck,

Harold

Harold Teer
1991 Westy -- VANGAUX
Harrisonburg, VA

On Sun, May 1, 2016 at 8:57 PM, Alistair Bel <albell@shaw.ca> wrote:

> Open tho access port on top of tank, fish out the pump. Look at bottom of
> pump, the intake. You will see a little tab that is the centre of the pump
> impeller. Give the tab a twist , do it with tap switch on.
> See if that starts up the pump. I have found that as the pumps get old
> they can " hang up" and not spin.
>
> Alistair
>
> > On May 1, 2016, at 5:49 PM, Marc Perdue <mcperdue@GMAIL.COM> wrote:
> >
> > Hi all,
> >
> > My potable water pump is not working. I replaced the faucet with a
> > Shurflo, not necessarily because the original faucet was bad, but
> > because I wanted to. Having city water is not a consideration for me;
> > I've never hooked up to city water and don't intend to. I also like
> > the fact that the Shurflo is variably adjustable and that the faucet
> > itself is adjustable up and down.
> >
> > After installing it, I made sure there was enough water in the tank
> > that the pump should work. There has to be .5 to .8 gallons or the
> > pump won't turn on. I had enough water in it that the yellow light
> > came on on my display, roughly between a third and half a tank. I
> > checked the voltage at the blue and brown wires coming from the pump
> > itself and got 0 VDC with the faucet off. With the faucet on, the
> > voltage was 12 VDC (or maybe -12 VDC). This seems to indicate to me
> > that the faucet switch is working correctly and that voltage is
> > getting to the pump when the faucet is turned on. It also seems to
> > indicate that the pump itself is bad. Am I interpreting my results
> > correctly?
> >
> > Thanks,
> > Marc Perdue
>