Yup!  Sounds like you have wrecked the pump. I did he same thing with
mine when I was new to Vanagons.

The pump is located on the rearward right side of the engine. Accessable
by simply removing the engine hatch cover.

If your power steering rack was the cause of the leak, remove the rack,
remove the pump, flush  the lines with fresh fluid,install new rack and
new pump. Fill the reservoir. After filling the fluid reservoir, start
the engine and allow the  pump to run just a little bit, then  turn the
steering wheel right and left all the way to the stops. Do this several
times. The system is self bleeding for air, and this procedure will take
care of it.

Good driving.

Regards,

John Rodgers
88 GL Driver

Stephen Edwards wrote:

> First off, thanks to everyone who responded to my "need some adwice"
> plea.
>
> Tonight I have a new problem.  I think I've let the steering fluid
> leak in my '90 GL go on for too long.  I put off fixing the leak
> because the pipe is so expensive, and thought it would be OK to keep
> on topping up the fluid every time the whine became noticeable, but
> today it got to the point where it whines all the time even when I've
> only just topped up the reservoir.
>
> Does it sound like I've wrecked the pump?  Where _is_ the pump anyway?
>
> Steve
>
>