I have a VW relay.  It is wired correctly.  It is activated by pulling the wiper stalk towards the driver.  The same action as one would use to activate the front windshield washer.  When pulled towards the driver, neither the wash nor the interval length work.  I have the relay you mention.  They all work the way described above, in a Vanagon, to my knowledge.  If not, please tell me how yours works.
Dave B.

-----Original Message-----
From: vw_van_fan_Mark <madvws@cox.net>
To: ddbjorkman@verizon.net <ddbjorkman@VERIZON.NET>; vanagon@GERRY.VANAGON.COM
Sent: Mon, Aug 24, 2020 12:37 pm
Subject: Re: Unintended consequences

I would suggest you get an actual VW version that programs the delay 
with normal intermittent wiper lever action, not with wash/wipe action.

Relay 99 is most common, also 197 and 198 are some later versions.

Mark

ddbjorkman@verizon.net wrote:
> Hello All.  Hope this gets out.A couple of years back, as I was travelling the PCH, I stopped into Van Cafe and purchased a relay that allowed me to change my interval wiper speed.  That is accomplished by quickly pulling up on the windshield squirter.  I loved it and used it often.  So often, in fact, that now my squirter, and with it the interval changer, are not working properly.  Those arms have been an area i would rather not mess with, but here goes.  Any e-mail diagnostics?  Have others experienced this and what is one to do?
> Dave B.
>