An ideal voltage range on the hotwires of a Molex Connector is _____

• A. Red = 5V, Yellow = 12 V
• B. Black = 5V, White = 12 V
• C. Red = 12V, Yellow = 5 V
• D. Brown = 5V, Purple = 12 V

Answer: (A)

On a standard Molex 4-pin power connector, the red wire carries +5V and the yellow wire carries +12V, with black wires serving as ground. So the expected hotwire voltages are red for 5V and yellow for 12V. This is the typical wiring used by older components like IDE drives, so the pairing red = 5V and yellow = 12V matches the connector’s standard. When testing with a multimeter, you should see about 5V between red and ground and about 12V between yellow and ground. Other color assignments don’t follow this standard, so they wouldn’t be correct for these hotwires.