Molex to P4 Power Connector

You will need:

• Male P4 power connector (Salvaged or bought)
  
• Female molex power connector (Salvaged or bought)
• Soldering Iron
• Solder
• Heatshrink or electrical tape
  

You may need:

• Suitable gauge wire for joining or extending the connectors. Make sure to check your power supply's label to ensure that your wire can carry the stated current.

Instructions:

• If you have salvaged a P4 male connector with wires already attached the the task is simply connecting wires together. If, however, you have bought the connectors yourself you will need to attach the appropriate wires as necessary. The following diagram shows how to connect the wires together:
  
• My molex connector was salvaged from an old fan which had a passthrough connector. Here is my salvaged molex connector with wires already coming out of it:
  
• I salvaged a P4 connector, with wires attached, from an old, broken power supply:
  
  
• First join the two yellow wires (12v) together, then join them to the yellow wire on the molex connector.
• Then you need to join each black wire (Ground) to a black wire on the molex connector, it does not matter which way you do it.
• Solder all of these connections together.
• Cover any bare wire with heatshrink or electrical tape. Here's what my completed cable looked like once it was all soldered and covered with heatshrink:
  
  
• Visually inspect the connection to ensure that it is sound. It wouldn't hurt to test it with a multimeter or continuity tester too, but with such large wires you shouldn't really go wrong.
• Finally hook it up to you power supply and use it!