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04-24-2018, 03:11 PM
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Join Date: Nov 2017
Location: ND
Posts: 452
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Molex pins for elevator trim servo
I am having trouble getting the pins that came in the empennage kit for the trim servo inserted into the Molex connector. They go in fine but not far enough to click into place, and those little tiny wires don't make a great platform for pushing the pins with much force.
Probably, I screwed up the crimping by using a cheap tool, and the imperfectly crimped pins are interfering with their own insertion into the connector. I bought a better crimper for future use. But I can't figure out precisely what to order or from where, to get replacement pins. I ordered some from Aircraft Spruce but they are way too big.
Any tips on either inserting the pins into the connector or finding replacement pins? Thanks in advance!
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04-24-2018, 03:25 PM
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Join Date: Oct 2007
Location: Sacramento, CA
Posts: 3,351
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I used good tools and still had trouble getting them to lock-in but if carefully done, they will go in far enough to lock in place. Try turning them (changing the orientation) a bit as you are pushing them in. When they have gone far enough, they would lock in place.
Hope this helps.
__________________
Mehrdad
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - Flying
Dues paid
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04-24-2018, 03:46 PM
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Join Date: Jan 2015
Location: Kansas
Posts: 169
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I thought I might run into the same problem. With everything I'd read about the first attempt crimping and inserting pins into Molex connectors, I decided to order a few and practice. With all the variations out there, it was tough to find the right ones. Below is a picture of my packing slip. Pins were and exact match and the plug is the same plug sent by Vans. Freight was more than the cost of the items.
[IMG]  [/IMG]
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Dues Paid for 2020
RV-14
Empennage Complete (including fiberglass)
Wings complete (including fiberglass)
Fuse joined and working on painting interior
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04-24-2018, 04:21 PM
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Join Date: Nov 2016
Location: Scottsdale AZ
Posts: 251
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Make sure they are going in the correct orientation and use a tiny flat head screwdriver to push the pins.
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Kevin Lippert
RV-14A N1402 Flying 03-2020
Phase 1 Complete 07-12-2020
Build Log
Zenith 750 completed 2016 -
Sold
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04-24-2018, 05:10 PM
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Join Date: Apr 2014
Location: Canada
Posts: 25
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Call Steinair. They built the harness for Vans. The tech there was awesome on the phone and explained everything in detail. Went as far as texting me a picture of a properly done crimp. I bought the good parallel jaw pliers from them as well as a bunch of extra pins. Practiced on the pins and exact gauge wire before I did the servo connector. Also bought a bench mounted magnifying glass with a light! Go broke with style.
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04-24-2018, 06:10 PM
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Join Date: May 2015
Location: Crittenden, ky
Posts: 194
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Ditto Steinair - they have the pins and insertion removal tools.
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04-24-2018, 06:24 PM
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Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,596
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Do yourself a favor and cut off those tiny molex plugs and replace with standard plugs from Stein.
Carl
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04-24-2018, 07:52 PM
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Join Date: May 2014
Location: Seattle
Posts: 323
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after a few weeks flying, the trim positiion indicator failed and I tracked it down to the plug at the tail cone. One of the wires in the supplied harness just fell out of the plug. I replaced the plug with a d-sub 9-pin connector and all has been well since
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RV-14A flying 410 hrs
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04-24-2018, 08:13 PM
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Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 2,791
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or a DTM sealed connector with gold pins in an area with less vibration.

__________________
Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all
Simplicity is the art in design.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
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04-24-2018, 09:18 PM
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Join Date: Nov 2017
Location: ND
Posts: 452
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That DTM connector is a thing of beauty. Do you have a recommended source in the US?
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