How's your wiring harness connection up front?  I had my switch driving me
crazy until I revitalized the contacts within the main wiring harness that
connects to the instrument cluster.

https://www.thesamba.com/vw/forum/viewtopic.php?p=8457708#8457708

https://www.youtube.com/watch?v=n8F4VRNOm7s

On 7/31/17, moritz schmid <schmidm90@gmail.com> wrote:

> I had an issue with the buzzer this weekend that I have not yet completely
> figured out. I drove my Syncro to Portland, ME (140ish miles) no issue.
> When I started the ride home the buzzer came on as soon as I pulled out of
> the driveway and then went off 2 minutes later. I stopped for fuel on the
> way home and then it came on again and this time did not shut off. I
pulled
> over immediately again and double checked the oil etc (all good, no
> gasoline smell). Started up and the light stayed off and I made it home.
> Started the bus yesterday again to check everything and the light was on
> again (once you rev it over 3k). I ordered the replacement high pressure
> sensor as well as the oil filter adapter plate to install a pressure gauge
> to get to the bottom of it! I have checked all the wiring to the sensor
and
> it all tests out/I replaced it. Will keep everyone posted/share my
write-up
> once I get the gauge and new sensor installed.
>