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Mil Spec wiring?

EFI Wiring Fundamentals

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Discussion and questions related to the course Motorsport Wiring Fundamentals

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Where does one find more info about how to build Mil-spec wiring harnesses and techniques? service loops on a cannon type connector, concentric twisting, strain reliefs etc?

Also Looking for a connector similar to attached- i have found similar but not the same- any leads?

Attached Files

Unfortunately right now there is very little information out there on proper 'mil-spec' wiring techniques. We will be offering a course that goes into these techniques in detail but that won't be for some time unfortunately.

There is a great resource on the subject here: https://www.rbracing-rsr.com/wiring_ecu.html

It won't tell you everything you are wanting to know but it will give you a lot of valuable pointers.

For the deutsch autosport connector pictured, try any of the suppliers listed in the Wiring and Accessories Suppliers List here: https://www.hpacademy.com/forum/efi-wiring-fundamentals/show/wiring-and-accessories-suppliers-list

Agreed with Andre. You will be hard pressed to find anything on it other than the Rbracing article (which is an amazing article). If you have an instagram, you can follow lots of wiring guys (@racespec is a great example and @smithracewire) and pick up tips and tricks on how to do it. When asked how to do it, all I say is, grab 19 wires of the same awg (preferably no bigger than 20awg) and replicate what you see in the pics. 1 wire for the core, 6 wires twisted one direction, 12 the other direction. If done right, it will lay flat and even. You can look over articles and pics all day, but until you try it yourself, you're not going to really understand it.

Here's another great piece from rbracing that I've looked over several times in the past: https://www.rbracing-rsr.com/sq6wiringloom.html This shows a full build. Still boggles me that guys use only 1 color lol But I can't argue the amount of money you save from only using one color!

"Still boggles me that guys use only 1 color lol But I can't argue the amount of money you save from only using one color!"

Back in the mid 1990s I was asked to repair a wiring loom on a Dodge IH (International Harvestor) at the place I was working at. I hopped in the cabin, pulled the glove box, gauge pod, and a few others bit and pieces out and saw that every wire inside the cabin was yellow and had no markings on them for what circuit they were for. I assume the engine bay was the same but they were all taped up in black electrical tape. That is how the truck came from the factory. A lot of probing back and forth, separating individual wires from the loom, found the wires that needed repair and replacing but I would never want to do that again.

I know your pain, did a semi truck a few years back when I was 18 (just started getting into wiring) and instead of yellow, this guy's wiring was all black, from factory, at least as far the chassis went. Grabbed the multimeter, a dr. pepper and got to work lol luckily all he needed was some extremely basic I/O switches for accessories

As for staying on topic, I would recommend OP to grab at least 3 colors of /16 or /32, then find something to wire... or make a "display harness", just so you can get the practice in :)

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