John Deere 750 Electrical Connector

[jekyl]

Hello Folks,

I have a broken wire in the starting circuit on my tractor. I was able to get the white plastic ends off of the wire in question. What I don't know is the technical name for the brass connector. There seems to be many styles similar to this one. The wire seems to be only 18 gauge but the male and female connectors are quite large. I measured them at roughly 0.315" wide and 0.500" long. That would be the male/female cavity measurements. The wire on either end appears to be about a 10 or 12 gauge. It is odd that such a small wire was placed between two much larger gauge wires.

I attached three pics. Thanks for any help you can give me in finding the brass connectors. If I can not find them then perhaps I can just wire in a different connector altogether.

Also on my tractor are a couple of those white plastic connectors that have dry rotted over the years. Any idea what they are called and where I can get some? Thanks again.

 

[beenthere]

Nearest AutoZone should have a good selection of connectors, or a similar store like NAPA, O'Reilly's, and the like. If RadioShack were still around, they'd be good too.

 

[rScotty]

They are called "spade connectors" & come in pairs...male and female. A couple of bucks a dozen.
There are so many different sizes that you are better off to just buy new ones that are close in size to your old ones and change them out as a pair.
If the new ones are anywhere close to size of the old ones then electrically they will be interchangeable.

I'd look at Home Depot and Ace Hardware, both should have a selection.

If you don't like to solder, just scrape the wire clean, and crimp a new connector on with pliers. Wrap it with electrical tape if you wish.
good luck,
rScotty.

 

[jekyl]

Thanks Gentlemen. Ill get back to you on what I came up with.

 

[Zebrafive]

Is this what you need? From JD parts

 

[jekyl]

That’s it! Some how I missed that diagram. The diagram I saw was not that detailed. Thanks for your help. I really appreciate it.

 

[jekyl]

Is this what you need? From JD partsView attachment 707053

Found that diagram. Thanks again! I considered ordering the main wiring harness, 600 dollars!

 

[Zebrafive]

I was surprised to see JD offered it at that price (low for JD, the small wire harness, not the main harness)

 

[CoyPatton]

You can buy spade connectors that go inside an insulate cover. These should be available at mist of the stores already mentioned. It is good to use this style where you are putting in connection on positive wires where metal contact is possible (ground). Also there are a variety of male/female connectors that could be substituted for the standard spade terminals. You would probably need to replace the ends still on your tractor.

 

[Jims1025R]

Crimping these spade connectors on is simple and reliable with the correct tool. With the incorrect tool, it will result in an unreliable connection, here's why: The correct crimping tool for these constrains the width of the connector, so it cannot squish out the sides when the thickness is compressed. The correct tool actually has a ratchet which means that th etool won't complete the crimp until the correct geometry is complete. Commonly, these connectors are crimped on with a combination cutter/crimper/stripped tool, which costs about $10. They work, but result in a less than desirable crimp, which may loosen over time. When the crimp is just squashed flat, as the wire wiggles, the squash flat tends to spring open just enough to result in a poor/intermittent connection.

If you have to do a quick repair, and you don't have the correct tool, sure, squash the crimp flat with whatever you have. But if you are doing a job you would like to be permanent and reliable, it's better to use the correct tool. You'll recognize that you have a correct tool ("AMP" is a brand) because it will hold the crimp connector by its sides in one jaw, before you close the tool to crimp against the other jaw.

Intermittent and poor electrical connections are a pain to diagnose later in life, so it's better to not build them in to your repairs! I know it's only a tractor, but an electrical fault can still be really inconvenient! I've spent 40 years working on and rewiring airplanes with these connectors. When I've seen what comes in needing repair, I realize why the connection was poor - wrong crimping tool for the previous work!