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02-24-2013, 06:00 AM
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Join Date: Feb 2006
Location: South Carolina
Posts: 659
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Wiring in a light to fuel pump system
DISCLAIMER: I know very little about how electricity works.
I was wanting to put an indicator light in the circuit for my fuel pump to indicate operations. I've tried a few things but nothing works. I can get the pump to run but no light or the light comes on and no pump.
Here's a pic of the current wiring...
I didn't have it in the pic but there is a 5 amp fuse between battery and switch.
Any suggestions as to adding a light to the system?
__________________
"Pilots: Looking down on people since 1903"
(author unknown)
RV-9, N556RM, O-320, Dual PMags, Catto 3 blade.
FLYING since 2018
Mosquito XEL ready for flight
Last edited by Robert M : 02-24-2013 at 06:14 AM.
Reason: added photo
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02-24-2013, 06:16 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Just put em in parallel similar to this...
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02-24-2013, 06:51 AM
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Join Date: Feb 2006
Location: South Carolina
Posts: 659
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REALLY, it's that easy? DANG!
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"Pilots: Looking down on people since 1903"
(author unknown)
RV-9, N556RM, O-320, Dual PMags, Catto 3 blade.
FLYING since 2018
Mosquito XEL ready for flight
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02-24-2013, 07:01 AM
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Join Date: Sep 2005
Location: Dothan, Alabama
Posts: 1,487
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For what its worth, I installed one. I still forget and leave the darn thing running. I have a blue light. I have had passengers ask "What does that mean?"
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Alton DeWeese
N526RV RV7A Tip Up, IO360 180 W/Hartzel BA prop.
Flying ~950 hours since Aug 2010
N4IDH
Construction Log
?The secret of getting ahead is getting started. The secret of getting started is breaking your complex overwhelming tasks into small manageable tasks, and then starting on the first one.?
?Mark Twain
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02-24-2013, 07:21 AM
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Join Date: Dec 2006
Location: TexaRado
Posts: 772
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Quote:
Originally Posted by AltonD
For what its worth, I installed one. I still forget and leave the darn thing running. I have a blue light. I have had passengers ask "What does that mean?"
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Aha! You should never use blue.  The eye is not very sensitive to blue. The luminance value (brightness) comes from about 30% Red, 60% Green, 10% Blue. You should use red or green (or red+green = yellow) and then make it flashing and then put some words on it (legend) like "DANGER".
Last edited by GrayHawk : 02-24-2013 at 10:13 AM.
Reason: Edited as some people can't see the smiley face.
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02-24-2013, 07:57 AM
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Join Date: Aug 2009
Location: Newport, RI
Posts: 705
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Dummy light
I rigged up a white indicator light on my panel
For the fuel pump.
Very easy. Just hook it to the panel switch
to the fuel pump. When the pump is powered, the light
Is as well.
Steinair sells very nice little indicator lights.
various colors.
__________________
Al Girard, Newport, RI
N339AG
RV-9
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02-24-2013, 08:32 AM
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Join Date: Feb 2006
Location: Friendswood, TX
Posts: 68
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Quote:
Originally Posted by GrayHawk
Aha! You should never use blue. The eye is not very sensitive to blue. The luminance value (brightness) comes from about 30% Red, 60% Green, 10% Blue. You should use red or green (or red+green = yellow) and then make it flashing and then put some words on it (legend) like "DANGER". 
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In the airline world, a blue light is used to show "a temporary system in normal operation".
It's my opinion that different color lights are a good idea to allow the pilot to react to a situation based on color. If all warning lights are red then we learn to ignore a light because we expect to see a red light when the fuel pump is on. If the red light happens to be "low oil pressure" we might not notice until something bad happens.
I would keep the number of lights to a minimum. Use green or blue for things like fuel pumps, flaps. I would save red and yellow for things that are bad and will be bad soon items.
David
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02-24-2013, 09:10 AM
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Join Date: Nov 2007
Location: Reno, NV
Posts: 2,125
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IMHO, placement of annunciator lights is important too. When I purchased my plane, the buddy that sold it to me and checked me out in it, would ask me "what the heck is that boost pump light still doing on". It was a little green LED placed way down in the lower right corner of the panel (RV-6), just above the air vent...almost worthless there!
When I did a panel upgrade, annunciator placement was an important element to me. I went with this:
I did use blue, because (as David said) blue in the jet at work means system or valve position or normal operation (including fuel crossfeed and spar valve position). I just used blue to indicate boost pump (it equates to fuel in my brain), and green to indicate landing light (like 3 green, green equates to landing gear or landing light in my pea-brain  ).
FWIW, I set my annunciator system methodology up as cool colored lights (green/blue) OK for TO and LNDG, hot colored lights (yellow/red) not OK for TO and LNDG. I think I heard Paul Dye describe it that way...probably stole it from him!
I don't disagree that blue or green are less attention getting, but also concur with not wanting to desensitize to red or yellow lights. Put them in front of your eyeballs, and all colors should work OK. And if you fly at night, the blue and green being a bit dimmer is not a bad thing during TO and LNDG either.
Sounds like the OP has the light rigged already, so none of this may matter to him, but those contemplating an annunciator panel might take nugget away.
Cheers,
Bob
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02-24-2013, 09:29 AM
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Join Date: Jul 2007
Location: Santiago, Chile
Posts: 447
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Like me just install an Andair pump, it is so noise that you don't forget is on 
__________________
Fernando Abasolo
Santiago Chile
SubSonex waiting for tailkit to arrive 
Flying phase II RV-8 (SCSE) Serial Number 83290, Tail Number CC-AJC
Flying RV-8 (SCTB) Phase II 600 hours and counting since February 22nd 2010
Serial Number 82727, Tail Number CC-PXG
Lyc. IO-360, Hartzell Prop
VAF #2056
EAA Member 774981
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02-24-2013, 09:40 AM
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Join Date: Apr 2005
Location: KSLC
Posts: 4,021
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My fuel pump switch lit red, and a amber light was included with the annunciator lights. I had a problem forgetting the fuel pump with Piper products.
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