Electric Fan Ground

Discussion in 'Ignitions & starters and electrically related comp' started by DorianL, Dec 26, 2020.

  1. DorianL

    DorianL solid fixture here in the forum Staff Member

    I’m using a Black Magic fan and it comes with a wire that grounds to turn on.

    The Fi-Tech I have sends a 12V signal to start the fan.

    Can I use that 12V signal to fire a solenoid to ground the electric fan’s signal wire ?
     
  2. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    sure you can
    https://www.hagerty.com/media/maintenance-and-tech/understanding-relays-part-3/

    get out a multi meter and verify you get the connections and result you want

    but
    Terminal

    Which Circuit?
    Definition

    86

    Low current (control)
    Relay coil + (power input)

    85

    Low current (control)
    Relay coil – (ground)

    30

    High current (load)
    From battery +

    87

    High current (load)
    Output to device, normally open, pulled closed when coil is energized

    87a

    High current (load)
    Only used on single-pole double throw (SPDT) “changeover” relays. Output to other device, normally closed, pulled open when coil is energized



    http://garage.grumpysperformance.co...urrent-flow-grounds-and-more.3504/#post-54625

    http://garage.grumpysperformance.com/index.php?threads/why-a-relay.15861/#post-95246
     
    Last edited: Dec 26, 2020
    DorianL likes this.
  3. DorianL

    DorianL solid fixture here in the forum Staff Member

    Excellent. The ride seems to get a little hot at idle. I’m suspecting the electric fan’s thermostat isn’t going low enough. The EFI would probably be more precise.
     

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