On my (German version) 84 Diesel, this switch controls the rear fog lamp. Take off the instrument panel cover, and see if the switch
is connected up. If so, post the colours of the wires!

Robin

Stefan Weir wrote:

> On my '82 Diesel I have a mystery switch on the dash.  On the right side of
> the dash panel, there is a switch for the rear defroster, below that the
> hazard flasher switch and then below that an unlabeled factory switch that
> doesn't appear to do anything at all.  Can anyone guess as to its fundtion or
> intended function?
>
> Thanks
>
> Stefan Weir