| [GMCnet] Re: Looking for electric fuel pump control [message #367201 is a reply to message #367189] |
Thu, 14 October 2021 07:04   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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Senior Member |
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Matt,
I really hate being a nit-picker, but just to keep everyone straight: That
arrangement of diodes provides OR logic, not AND. In other words, the
circuit is activated when one OR another of the switches is closed.
To provide an AND function, switches merely need to be wired in series.
You knew all that, but some readers may not.
Ken H.
On Wed, Oct 13, 2021 at 10:14 AM Matt Colie wrote:
> Ken Henderson wrote on Tue, 12 October 2021 18:54
>> Matt,
>>
>> Here's a list of the applications for what I'm in the habit of calling a
>> "Vega Switch":
>> https://1drv.ms/t/s!Ai1vXmS6UF0_gotF3OLJPne3NDCh2w
>>
>> And here is the diagram of my pumps, as I drew it in 2010:
>> https://1drv.ms/b/s!Ai1vXmS6UF0_gotLYbNzGmIJMNYfvA?e=md8n9j
>>
>> Ken H.
>
> Ken,
>
> Your diagram has lots of good ideas that I may borrow. The diode AND gate
> is a great start.
>
> What I have been hoping to locate is the Vega (We had one back then) fuel
> pressure relay with an "On Delay" so it powers the fuel pump for a given
> time when the ignition is turned on. I have found references, but nothing
> with a working part number. That could eliminate the "prime" switch.
>
> I really like the idea of the alternator output as a signal because it
> exists. It works great for my electric choke.
>
> Fortunately, I have a lot of time before I tear into the coach for the
> winter re-fit.
>
> Matt
> --
> Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL,
> GMCES
> Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum
> Brakes with Applied Control Arms
> SE Michigan - Near DTW - Twixt A2 and Detroit
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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