I have seen military series 3 109s with single speed wipers so this is
likely what you have. It is also entirely possible that the wiper motor
is a 2 speed unit but the low speed was deleted at the switch to meet
mil spec.
The wiper motor needs :- a switched power wire for at least one speed, a
power wire switched only by the ignition switch for the self parking and
a ground (this is usually a black wire grounded to the bulkhead near the
motor), it MIGHT have have a second switched power wire for low speed.
The little switch at the bottom is the washer switch and is a simple
single pole momentary contact switch with 2 tabs.
Hope this helps
John and Muddy
Paul Schultz wrote:
>
> John, I don't think my wipers are two speed. I was hoping they were two
> speed and thought the only reason they are one speed was the cheap switch
> and wiring used by the PO. But, when I found the original switch, it only
> twists on-and-off. It doesn't click into a second position at all.
>
> Can anyone educate me on which models had the 2 speed wipers? My Series III
> 109SW is actually a combination of a 1967 109 SW with the
> drivetrain/mechanicals/dash from a military Series III 109. The wiring and
> instrument panel are all basically series III.
>
> Paul.
> Series III 109SW
> ---------------------------------
>
> John Cranfield <john.cranfield@ns.sympatico.ca> wrote:
>
> I memory serves me well you should have one main tab as power in and two
> tabs as power out for hi and low speed and the small "box" on the end is
> a separate switch for the washer which should have 2 tabs or 1 tab out
> to the washer pump and connecting wire to the power in tab of the main
> switch
> Very often one of the washer tabs would break off causing a failure of
> the washers.
> John and Muddy
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