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09-26-2013, 05:38 AM
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Join Date: Mar 2010
Location: Raleigh, NC
Posts: 863
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Fuel Pump Switch
I am preparing to put a fuel pump switch. Is there a best, easiest way to do this regarding the wiring changes? I have not checked the back of the fuse panel yet, too happy to be flying  .
For me the best solution would be to find a switch including the fuse with compatible blades with the fuse so that it could be plugged into the fuse panel at the place of the fuel pump fuse. Kind of a dream solution!
Last edited by WingedFrog : 09-26-2013 at 05:45 AM.
Reason: more details
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09-26-2013, 06:11 AM
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Join Date: Mar 2009
Location: Netherlands
Posts: 663
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I installed the switch next to the valve. Just cut the red wire running to the pump. Installed an extra wire back to Skyview to indicate the status of the pump (see the red button between the stall and spar indicator).

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09-26-2013, 06:12 AM
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Join Date: Oct 2010
Location: Elkton, Md.
Posts: 1,652
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__________________
Wag Aero Sport Trainer built,sold and wrecked
N588DF RV12 #336 built, sold and alive and well in New York
N73DF RV12 #244 built, sold and alive and well in Florida
N91 RV RV9 I wish I could say I built this one! Mark Santoleri hit the ball out of the park on this gem.
Currently restoring a 1978 Citabria GCBC
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09-26-2013, 06:36 AM
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Join Date: Mar 2009
Location: Netherlands
Posts: 663
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Quote:
Originally Posted by Dave12
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That is the D-180 switch panel. Not for Skyview.
If you switch off the pump at the circuit breaker position you will also switch off both cooling fans.
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09-26-2013, 06:42 AM
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Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,647
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Similar to Joeri, but on the vertical bulkhead just below the power outlet. I will typically leave the pump on as intended, but want the ability to isolate it if necessary.

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rgmwa
RV-12LR 912ULS
120346
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09-26-2013, 09:34 AM
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Join Date: Sep 2006
Location: Windsor, California
Posts: 924
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Be careful, the fuel pump circuit also powers the two cooling fans on the avionics shelf. Turning off the fuel pump at the fuse position would also turn off the cooling fans- and that's not a good thing... :<)
__________________
David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)! 
V AF donation through June 2021.
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09-26-2013, 06:09 PM
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Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
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My aircraft doesn't have lights so I spliced the fuel pump wire to the Nav light wire just forward of the flap handle in the central wire bundle. That way the fuel pump has its own switch and fuse. Best of all an inop switch now has a purpose and I didn't have to mess with the control panel.
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09-27-2013, 05:24 PM
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Join Date: Dec 2011
Location: TWIN WATERS, Queensland, AUSTRALIA
Posts: 89
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pump switch
Hi Gagarin737, I am also thinking of installing a switch for the electric fuel pump.( Don't like the idea of it running continuously). Your wire 'back' to the Dynon Skyview, - do you mean 'back' to the ADAHRS box, or 'back' to the Skyview unit on the instrument panel? I confess I am still pretty vague as to how (and about what) the ADAHRS & Skyview itself talk to each other... Thanks, Cheers, DEAN....
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09-27-2013, 06:17 PM
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Join Date: Aug 2010
Location: Marshall TX (KASL)
Posts: 1,783
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The ADAHRS gets pitot, static, OAT, And AOA sensor inputs/signals. It also senses pitch, roll, and yaw like a gyro, via solid state accelerometers, as well as magnetic heading. It is a computer. It takes all these inputs, converts them continuously to a stream of numbers such as altitude, airspeed, DA, etc. etc. etc. and streams them to the Skyview EFIS. Or, something like that...
Last edited by Bill_H : 09-27-2013 at 06:19 PM.
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09-28-2013, 01:20 AM
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Join Date: Mar 2009
Location: Netherlands
Posts: 663
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Quote:
Originally Posted by dinowal
Hi Gagarin737, I am also thinking of installing a switch for the electric fuel pump.( Don't like the idea of it running continuously). Your wire 'back' to the Dynon Skyview, - do you mean 'back' to the ADAHRS box, or 'back' to the Skyview unit on the instrument panel? I confess I am still pretty vague as to how (and about what) the ADAHRS & Skyview itself talk to each other... Thanks, Cheers, DEAN....
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From what I remember.....
When you close the switch the pumps get 12volts (duh..) but I soldered an extra wire to that side of the switch. That wire goes back to the panel and connects to pin 2 of the EMS. Pin 2 is a voltmeter (a standard Skyview pin can only measures volts up to 5V).
Thereafter you can create an extra button on the Skyview display (0-5V is off, 5-12V is on)
I only use the switch on the ground during preflight or when programming the Skyview. In flight I leave the pump on.
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