REFLECTOR: Boost fuel pump switch

[Tom Falls]

Don,

I remembered your question when reviewing the section on switches in Bob
Nuckolls AeroElectric Connection. The attached pic is from page 11-9 and
shows 2 good examples of how to use a 2-10 switch (double pole on-on-on) to
function as off-on-on.

Tom


On Mon, May 27, 2013 at 6:18 PM, Don Johnston <numa at comcast.net> wrote:

> This is a minor thing, but then again, it all about the minor things,
> right?
>
> I'm starting on the wiring and I'm looking at the fuel boost pump. It's
> got a high and low setting. Usually controlled with a standard SP3T switch
> (ON-OFF-ON) with down = low, middle = off and up = high.
>
> I would like to have my switch so that down = off, middle = low  and up =
> high. My logic (flawed as it may be) is that I would like to visually and
> tactically verify that everything is off by having all the switches in the
> same position (down).
>
> This would typically be accomplished with a progressive switch. However
> with a progressive switch the line which is "low" is switched on in the
> middle AND up position. I haven't been able to find a wiring diagram for
> the Dukes pump, but I'm guessing when "high" boost is needed, only the high
> line should be switched on. Not the high AND low.
>
> Does anyone know if such a switch exists that would accomplish this goal?
>
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