While it will appear to work fine putting the earlier headlight switch
into a 90-91 that came with the later switch,
you LOSE the fuse protection for all the dash lighting connected to the
switch dimmer wheel.

(if you use the later switch in an earlier van you will have NO dash
lighting)

Mark

Loren Busch wrote:
> RE: 90-91 Headlight Switches
> IIRC the headlight switch I have in my 90 is from an older Vanagon.  And I
> have never found any difference in performance. YMMV
>