Near Intersection of I-35 & I-90 Southern Mn. | Pin 1 is keyed 12VDC, Pin 2 is constant 12VDC, Pin 3 is ground (crosswise pin).. The Pin, sockets and shells are readily available. At least this wiring pattern is standardized throughout the industry.
As has been mentioned some are assembled with stub wires which you could splice on to your wires. This is probably a good choice if you are only dealing with one. They are expensive but handy.
It is possible to purchase the parts loose and attach them to your own wires. This can result in a more professional look. Special pliers are available to crimp the pins or sockets to your wires. It is possible to use other types of pliers to crimp the pins to the wires. Be careful that you insert the wires in the correct locations since it is possible, but a bit tricky, to remove them to relocate them to a different spot.
The sockets and pins are held in the plastic shells with a square lock made of plastic. This lock distorts when you assemble a unit and the plastic returns to "square" when it reaches an inner cavity to lock it in place. The pins or sockets can be removed by using a special tool. I've found that on my home crimped connectors that they are more difficult to remove when I have not been careful with my crimp. If the crimp is not nice and round, it is difficult to remove a pin or socket should it be necessary.
Making an adapter to gain length and switch to a different style connector seems like a great plan. That way you gain length and haven't disturbed any of the original wiring.
I have often used that approach when needing to "tee into" some wiring. Rather than strip some original wires and splice on to them, I try to find a connector in the wiring which I can unplug and insert a Tee cable in between the two connectors. This is often a bit more expensive since another pair connectors is needed but has the advantage of not interfering with any of the original wiring. I can remove the tee if necessary or if for some reason it doesn't work without messing up the original wiring.
Edited by tedbear 3/25/2025 06:11
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3 pin Amp connector, whats the 3rd wire?
