As Jeff said, it is a standard relay. You can probably borrow one from
another spot, assuming you have an 86+ that came with A/C.

There is nothing about it that makes it a VW part and generics are
available. It was used on other VWs so an auto parts recycling yard will
most likely have them too.

The stock headlights ARE NOT on this relay so if your headlights are out
as well you might need to dig deeper.

Mark

John Rodgers wrote:
> Anyone ever hear of this?
>
> I looked on three major list vendor sites and didn't find this listed.
> It's VW PN 191 937 503. Has a big "18" on the back side.
>
> When the ignition switch is turned on, this thing is activated - load
> reduction relay. You can feel it click under your finger tips when the
> ignition is turned on. This relay supplies power for headlight
> operations, and it also enables the front and rear wipers and the heater
> blowers,, both front and rear, as well as the wiper washer pumps.
>
> If you know of a source, please let me know.
>
> Thanks,
>
> John
>
> --
> John Rodgers
> Clayartist and Moldmaker
> 88'GL VW Bus Driver
> Chelsea, AL
> Http://www.moldhaus.com
>