92 Euro Westy. Does anyone know if there is a relay common to the temp gauge and fuel gauge? They are both intermittent and stop working at the same time. Sometimes a simple thing like adjusting the heater temperature can bring them both back on-line.
I looked at the wiring diagram - I didn't see any relay for either guage. You can try re-seating the connector(s) on the instrument cluster. Re-seat the applicable fuse. Otherwise, the problem may be internal to the cluster itself. There is a warning "module" within the cluster, but the fuel guage didn't seem to share that module with the temp and oil guages.