Electric Fan Ground

[DorianL]

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 ?

 

[Grumpy]

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

 

[DorianL]

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.