How to Assemble a Molex Connector

A Molex connector is used for a variety of applications from audio-visual components and automobiles to various accessories, computers and marine 12-volt systems. This article will help you assemble such a connector using accessible materials.


  1. 1
    Have a planned connector assembly, which you should lay out with the wires along with the socket and plug. The plugs are smaller than the sockets so they easily fit inside. Now place a male terminal pin next to each wire that goes to the plug as well as a female terminal pin next to every wire that will be attached to the socket.
  2. 2
    Using the wire strippers, take off about 5/8 inch insulation from the wires that you are going to attach to the Molex connectors. Use your forefinger and thumb to twist the different strands of wire together.
  3. 3
    Take just stripped wires and lay them into their connector terminal pins. Make sure that the bare wire is not in the tube but on the sleeve. Approximately 1/16 inch of insulation should come past the area of the crimp.
    • Feel free to cut as much wire as you need in order to meet both conditions.
  4. 4
    Use the Molex crimp tool V-section to crimp the wires into the connector pins’ conductor crimp area. According to Molex, it is a good idea to also pinch the crimp using the jaws’ V-shaped section around the insulator. There are crimp tools which have been manufactured with circular notches instead. This helps to crimp the insulation area in the wire shape.
  5. 5
    Take the connector terminal pins and push them into the socket and plug housings. The locking tangs, or fins, will easily snap once you properly insert the pins.
  6. 6
    Plug it together. Now all you have to do is to plug together your Molex connector sections. It's all done!

Things You'll Need

  • Molex connectors
  • Socket
  • Plug
  • Wire strippers
  • Crimp tool

Article Info

Categories: Pictures | Electrical Circuits and Devices