I don't know about the rear pump.

On the front pump, it's probably fluid sludge in the pump, or oxidation on
the electric terminals.

On my '84, it's easy to remove the washer pump from the fluid reservoir,
dismantle, clean the dried mineral deposits from the fluid conduits and the
electric conductors. Also, run a stiff wire or coat hanger through the
tubing leading to the windshield spray nozzles. Re-assemble in reverse
steps.

<amyian@fuse.net> wrote in message
news:1179536430.010506.233270@q23g2000hsg.googlegr oups.com...
> I have 1988 240dl. Car had been sitting for 2 years without moving. I
> was basically given it. Problem i have is that the slow wiper doesnt
> work and the washer pump front and rear not working either. I get
> 11.5 volts at the terminal on both pumps but not fluid gets pumped.
> Can i assume its the pump/pumps or is there a link between this and
> the slow wiper action not working. The other functions on the stalk
> work ok.
>