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  #1  
Old 07-17-2019, 12:19 PM
design4p design4p is offline
 
Join Date: Jul 2018
Location: CORWEN
Posts: 6
Default Common Wiring Harness WH-00125

The Common Wiring Harness WH-00125 cost over $1500 depending on what version you buy.

Looking at the wiring diagram there appears very little wiring included for such a large sum of money - $1500.

Before I commit to the common harness or do it myself I would like to know what experience other builders have had for this part of the build - The Electrics.

I will be going done the Garmin G3X route for my RV14 (in the UK)

Any guidance would be most welcome.

John
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  #2  
Old 07-17-2019, 12:41 PM
Nova RV Nova RV is offline
 
Join Date: Aug 2015
Location: Leesburg, VA
Posts: 389
Default

The main benefit of the 00125 is that it interfaces with the factory harnesses that come in the rest of the kit, wings and tailcone. These simply plug into the 00125. That said, if you get all of the mating Molex connectors and pins etc you can make for yourself and save money and modify as you like. For a new builder, the 00125 simplifies your build especially if wiring is not your thing. I used the 00125 but now that I have some wiring experience I would do it myself.
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RV-14A kit # 140243 (flying as of 11/18)
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  #3  
Old 07-17-2019, 12:45 PM
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Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,188
Default

Quote:
Originally Posted by design4p View Post
The Common Wiring Harness WH-00125 cost over $1500 depending on what version you buy.

Looking at the wiring diagram there appears very little wiring included for such a large sum of money - $1500.

Before I commit to the common harness or do it myself I would like to know what experience other builders have had for this part of the build - The Electrics.

I will be going done the Garmin G3X route for my RV14 (in the UK)

Any guidance would be most welcome.

John
As I have posted in the past, my one experience with the RV-14 wiring kits leads to my recommendation to just make your own wire runs. This is especially true if you what to do something other than duplicate the RV-14 factory plane and avionics. For me the standard Vanís design is good, but it does not quite meet all my design requirements.

But - Vanís sells a lot of these kits as customer demand is high. It boils down to what you are comfortable with doing yourself. But - wire is just wire. It is not rocket science.

Iím just finishing my third RV and have done every inch of wire, all connectors and full glass panels. If you have never done such work, perhaps you have a fellow builder that you can lean on to get started.

Carl
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  #4  
Old 07-17-2019, 02:39 PM
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jeffw@sc47 jeffw@sc47 is offline
 
Join Date: Aug 2014
Location: Simpsonville, SC (SC47)
Posts: 268
Default Its doable - a learning experience, if that's your bag

I built my own WH-00125. Bought the wire, the Molex and other connectors, and made the wiring layout board. Did a lot of planning.

Figure that it cost me around $700 and took me about 2+ months, at my pace.

Had to figure out the wire types and lengths, the connectors, and everything else; and then acquire everything - a few times. Did buy a wire labeler and about a dozen wire sleeve cartridges (+/- $40 each) and documented it pretty well.

At the time it was possible to buy a 'kit' of all the parts from Stein, not sure that it still offered. I did get some satisfaction in doing it myself, although it was a little bit of a job just figuring it all out even with the WH-00125 diagram. I did find a handful of typos and disconnects in the diagram but adjusted ok.

I installed it and a panel equipment harness from Approach Fast Stack and it all finally came together and powered up with no smoke.
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Simpsonville, SC (@SC47 > 10nm NW Triple Tree)
1946 Bellanca Cruisair 14-13-2 (73 YRS OLD 8/15/19)
RV14A (N14ZT), Ser#140195
Start 10/11/14
Dues paid 12/1/19 (USArmy 2/67-2/70)
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  #5  
Old 07-17-2019, 03:16 PM
design4p design4p is offline
 
Join Date: Jul 2018
Location: CORWEN
Posts: 6
Default 125 Harness

Hi,

Thank you Nova, Carl and Jeff for your advice. Also looked at your build log (Carl and Jeff).

All information very valuable to me.

Regards John (In the UK)
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  #6  
Old 07-17-2019, 06:06 PM
jdmrv7a jdmrv7a is offline
 
Join Date: Jan 2018
Location: DFW
Posts: 35
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I used the Stein build RV14 harnesses and the time savings was well worth the cost. When you see the quality and workmanship of these harnesses you will be hard pressed to replicate that level of experience. The Stein support is second to none if you have questions and you will if it is your first G3X panel.

I used an all Garmin G3X / GTN 625 system and they make a harness for that system. Have Stein or Approach Fast Stack make your Garmin CAN BUS harness and you will save so much time. I installed all my avionics and designed my panel but left matching hundreds of wires to the pro's that do it daily. Enjoy the process and keep your learning, skills and expectations aligned.
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  #7  
Old 07-17-2019, 07:13 PM
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mulde35d mulde35d is offline
 
Join Date: Dec 2017
Location: Williamsburg, VA
Posts: 204
Default Costs

Up to you. I personally spent about 100 hours digging through the garmin manuals and other installation instructions to create my own wiring diagram. I calculated out all the wires and connectors which cost me roughly $1300 for the entire airplane. Of note, the common harnesses include very little for your G3X install and likely need to be further modified for any different equipment you may want to use.

I am happy to send my diagram to anyone who would like it as a reference, but if you truly want to know and understand your aircrafts electronics the education is well worth the time (not to mention the cost saving).

You can take a look at my build log and previous threads for other discussions on the topic if you are interested in doing it all yourself. If anyone wants the wiring diagram for an RV-14A with a full G3X suite just send me a PM or email with your email address. It also includes antenna wiring, oil/fuel/brake routing, switch wiring, etc.
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RV-14A - N122X (IO-390 TB, WW 74HRT, G3X)
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  #8  
Old 07-24-2019, 07:29 PM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 75
Default Insure you request and get what you want

The Steins built custom harness is great if you get a custom harness to your specs. Make sure they know every detail of your build from stick grips to wing lighting. Again they are very good at doing these harnesses just need to know exactly what you want. A few catches. Vans does not like to support heated pitots. You will need a dedicated ground back to the firewall ground to insure your pitot heat does not make noise. They include power for the pitot but not the ground. (Fuselage harness kit) The wing harnesses do not even include power let alone a ground for the pitot, make sure you add these yourself as they are not included in the wing kits. Twisted pair seems to work well. Make sure you let them know for headsets what you want. They will wire the limo plugs or/and standard jacks as needed. Again Stein is a very good harness builder just need to inform and insist what you want.
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  #9  
Old 07-24-2019, 10:20 PM
mturnerb mturnerb is offline
 
Join Date: Apr 2015
Location: Ponte Vedra, FL
Posts: 1,140
Default

Quote:
Originally Posted by dmattmul View Post
The Steins built custom harness is great if you get a custom harness to your specs. Make sure they know every detail of your build from stick grips to wing lighting. Again they are very good at doing these harnesses just need to know exactly what you want. A few catches. Vans does not like to support heated pitots. You will need a dedicated ground back to the firewall ground to insure your pitot heat does not make noise. They include power for the pitot but not the ground. (Fuselage harness kit) The wing harnesses do not even include power let alone a ground for the pitot, make sure you add these yourself as they are not included in the wing kits. Twisted pair seems to work well. Make sure you let them know for headsets what you want. They will wire the limo plugs or/and standard jacks as needed. Again Stein is a very good harness builder just need to inform and insist what you want.
I agree and I'm happy with the results of using the SteinAir supplied harnesses. One correction: the fuselage harness does include a power lead for the pitot heat - there's a corresponding unused pin in the left wing molex so I ran my power wire (14Ga) for pitot to that open pin which corresponds to a 14Ga wire in the fuselage harness that plugs into it. I did have to run separate ground wire (also 14Ga) in wing and fuse for the pitot heat, which I connected separately when I installed the wings. I twisted the ground/power leads to the pitot heat controller from the regulator to the molex connector (but not the sense wire for regulation) and zero noise or magnetic interference from this wire (runs very close to magnetometer).
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Last edited by mturnerb : 07-24-2019 at 10:22 PM.
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  #10  
Old 07-29-2019, 11:27 AM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 75
Default Wing Harness

One other "possible" issue is the Nav-Strobe wiring is shielded in the fuselage harness and not the wing harness that comes with the kit. Seems ok for most (I've also seen where some builders had issues) but dislike chasing headset noise after the fact. Since I had some 3 conductor 18 awg. with shielded Tefzol around I pulled the 3 wires (pins 7,8,9) and replaced with 3 conductor shielded wire. If I had to do again would ask for a delete for WH-00011 R1 (2) since it's fairly easy to make one of these.
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