The solution to your instrument cluster and headlight problem may be fairly
simple.

I have experienced a similar problem twice over the years with an '85 and
an '87.

Under the dash, slightly left of the steering column, above the fuse block
is a large multi-point ground connector that is attached to the inside
body. Included on this multi-point connector are the ground wires for the
lights. Corrosion at the connections can cause the symptoms you are having.

To access the ground connections, remove the large mounting screws for the
fuse block and drop it down for easier access to the connector. Pull off
the connectors and clean them and the connector block with some sandpaper.
The space to work in is tight, and big hands like mine make the job a
little tough, but in about 15 or 20 minutes you should be able to solve
your problem.

Good luck.

Michael Vickey

87 Syncro GL
90 Westfalia Camper
90 DoubleCab Transporter (For Sale)
90 Double Cab Syncro Transporter
91 Carat
91 Westfalia Syncro Camper
93 Eurovan MV
99 Rialta HD