Knobs- Not sure what one is.

[Chaz]

Hey Guys,
  Simple, possibly dumb question: There are three knobs under the right side of the drivers instrument cluster on the dash of my 4108. The left and middle one is the wipers. The one on the right also controls air but just spins and doesn't seem to do anything. What is it?? Is it perhaps a faulty washer control?? I can't seem to find a way to conrtol the windshield washer.

   Knobs, knobs, knobs, who's got the knobs,
      Chaz

[TomCat]

I don't have any 4108 experience, but the three knobs for my air wipers are the two wiper controls, and the washer knob, which is pushed in to supply windshield washer juice (and must have air pressure to operate).
To activate my wipers, the knob is pulled out, then the speed is controlled by twisting the wiper knob counter-clockwise for slow, and clockwise for fast.

Jay
87 SaftLiner

[tekebird]

it is a washer  control......should be the one closet to the column.

[Chaz]

Thanx guys.
  Looks like mine is backwards----- go figure. The one closest to the column is the drivers wiper then the passenger then the "mystery knob". I never tried pushing it.    It just spun. I'll give it a twirl tomorrow.

   Knob Knowledgable,
       Chaz

[Beatenbo]

Try pushing in and hold about 5 sec and release. If working air pressure should spray.Make sre air is built up.

[DrivingMissLazy]

Try pushing in and hold about 5 sec and release. If working air pressure should spray.Make sre air is built up.

Might want to make sure there is water in the container also. LOL
Richard