Fan Control Wiring

Discussion in 'Fox 5.0 Mustang Tech' started by John Dirks Jr, Sep 17, 2013.

  1. I've installed an aluminum radiator with electric fan to replace my stock rad and engine fan. Where is a good place to tap into 12v hot with engine running? This is the feed that will energize the relay. Not the one that powers the fan. I got all that part done correctly.

    I though I had it all done. However, silly me had tapped into a wire at the diagnostic port. That wire was hot with key in on position but goes dead when engine starts.

    I need one that stays hot with engine running only.

    Thanks for your help.
  2. Try the red wire on the low coolant sensor on the radiator overflow tank.
    The red/green wire on the ignition coil.

    Both are live with the switch in the Run position.
  3. Perfect! Thanks.