Originally Posted by
jon@work
I thought that the low fuel and low washer fluid lights were simply switched by the relevant sender, either in the fuel tank or washer bottle, and that there isn't a "control module" required for them
Disconnect yours and see if the fuel light comes on
The old Mk1 Ghias had a similar, but more comprehensive display that was all controlled by the same module - oil level, coolant level, brake level, as well as fuel and washer level. The Mk2 Sierra's one is very much cut down.