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Old 09-06-2022, 05:16 PM
77bonanza 77bonanza is offline
Join Date: Jan 2016
Location: Gravois Mills, MO
Posts: 53
Default Installing WH-00125

I tried to search for tips for installing WH-00125 and found none. I am at wits end trying to install this harness. What have you done to get the wiring thru the holes as the connectors are all larger than the holes. At this point I'm thinking about cutting the wiring, install thru the holes then reattach with D-subs and cover with heat shrink.

Thoughts and PICTURES are greatly appreciated.

Thanks for your help!
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Old 09-06-2022, 07:12 PM
Blake Blake is offline
Join Date: Oct 2018
Location: Raymond wa
Posts: 159

I am working on my harnesses currently. If I had any problems with pulling the harness through a hole I pulled the pins out of the connectors and ran them
To there destination. I had to replace a couple pins and plastic connectors in the process. But I did not cut any wires. I wish the harness was longer at the end of the big D sub connectors because I had to exstend every wire that will be going to the panel switches. I think this harness is mainly focused on using the vertical power units.
2021 rv-7a built and flying
Donated 12/24/22
Rv-14a N927B flying and almost done with phase 1
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Old 09-06-2022, 09:35 PM
Allan Stern Allan Stern is offline
Join Date: Jan 2006
Location: Cape Coral, Florida
Posts: 320
Default Wiring harness

You might have to take off the shells from the plug and then you can turn it sideways and posh it through the holes. Also you might try this before you install the plastic grommets in hole. Cut them and install over the wires and into the holes.
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Old 09-06-2022, 09:41 PM
coffeeguy coffeeguy is offline
Join Date: Jul 2015
Location: Lake in the Hills, IL
Posts: 272

I was able to run everything, but I had to cut several grommets. The very worst ones were the runs to the sticks. Be patient and you should be able to get everything run.
Jeff Dingbaum
Cherokee 180
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Old 09-07-2022, 06:19 AM
Reflex Reflex is offline
Join Date: Jan 2015
Location: Kansas
Posts: 250


I recall the harness being a lot more work than I thought it would be. However, I don't recall having to remove anything to get the main wires run...perhaps I did and just don't remember. It would be pretty easy to remove the Molex connectors at the aft end to make running the lines easier. Here's what I do remember:
  • Main lines were too long (saw this on multiple web sites). So in the end, I removed the Molex connectors and shortened the runs.
  • Lines to the sticks were a nightmare and were too short.
  • Forward ends (with the large connectors) were far too long. Called the mother ship and was told "better too long than too short".
  • Lines to headset jacks were too short.
  • Lines to wings are too long (easily shortened)

One thing nice about the Molex connectors used is that the .093 pins are easily removed and replaced.

A couple of thoughts:
  • Don't install the snap bushings until the lines are run. You'll have to split them...your going to do that either way so run the lines first.
  • Lace the runs, makes it easier to control and run...looks nice too.
  • You'll likely need extensions to go to the sticks....order them now.

In the end I made them all work. Ultimately, I'd by the harness again as building it from scratch would be more difficult and time consuming than making it look nice and work. It would be nice to be able to by the harness without all the connectors attached. Probably can, just call Stein and order w/o connectors.
Dues Paid for 2023
Emp Complete (including fiberglass)
Wings complete (including fiberglass)
Fuse Complete
Finishing Kit Complete
Avionics Complete
Working on FWF

Last edited by Reflex : 09-07-2022 at 06:25 AM.
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Old 09-07-2022, 06:37 AM
Ron B. Ron B. is offline
Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,729

My build buddy installed the snap bushings before trying the harness. I only noticed what he was doing when he was done. He thought installing them was very difficult without the harness. He hadnít worked on planes before but caught on quickly. They were twice as hard to remove so that the harness could be installed first.
The harness is a challenge to install but take your time and follow the advice above. Ask an experienced builder for a bit of help, most of us donít mind.
Thanks Ron
RV-14 Flying
AirCam flying
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Old 05-01-2023, 11:10 AM
mc607's Avatar
mc607 mc607 is offline
Join Date: Apr 2014
Location: YQT, Canada
Posts: 167

Vans advised me to install the WH-00125 as late as possible. When is that? After which section? Iím starting section 36, Aileron and Elevator systems.
Todd B
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Old 05-21-2023, 05:24 PM
Halleffect Halleffect is offline
Join Date: Aug 2020
Location: Greensboro, GA
Posts: 26

Originally Posted by mc607 View Post
Vans advised me to install the WH-00125 as late as possible. When is that? After which section? Iím starting section 36, Aileron and Elevator systems.
I installed it right before starting Section 36.

RV-14A 140999
N83MV reserved


KCPP Greene County, GA
'23 Dues Paid
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Old 05-21-2023, 05:45 PM
dmattmul's Avatar
dmattmul dmattmul is offline
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 766
Default Tunnel

The tunnel can get pretty crowded especially if you have return fuel lines. Earlier is better. Not sure why Vans would say later......
RV-14A QB builds (2017), Lycoming 390 Thunderbolt arrived July 2019, Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 300-72, Earth-X batteries, Beringer wheels and brakes, Parts became real airplane 8/15/2020. Started RV-10 Nov 2020. Empennage arrived (Built) Working on QB kits. Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 3 blade HRT 378, Earth-X batteries, Beringer wheels and brakes, real airplane hopefully early-mid 2024. Paid subscriber

Last edited by dmattmul : 05-21-2023 at 05:51 PM.
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Old 05-23-2023, 03:50 PM
iamtheari iamtheari is offline
Join Date: Nov 2017
Location: ND
Posts: 632

If I built another RV-14, I would put the wiring harness in around the time I pop-riveted the baggage area interior. That includes WH-00125, the instrument panel, and the wires through the firewall.
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