Switch to turn on electric fan

67Continental said:
I would like to wire a switch to turn on my electric fan whenever I want - particularly when I am in traffic, or when I am waiting in line at the drags. I found a tutorial here for mustangs:

http://www.mustangforums.com/m_171586/tm.htm

Does anyone know the wire locations for the Mark?
Click to expand...

That Mustang mod won't work. This will...

Schematic.jpg
 
thanks for the quick reply - i appreciate the diagram, but I am not an electrician, and I don't understand how to read it :( What exactly does it mean?
 
67Continental said:
thanks for the quick reply - i appreciate the diagram, but I am not an electrician, and I don't understand how to read it :( What exactly does it mean?
Click to expand...


it's been years, but cut the light blue wire and put a switch on the lb (light blue)


I never liked wiring !
 
At the fan, they are 3 wires in the harness.

Light Blue = +12 V
Black = Ground

The 3rd wire(Iforget the color) is not used and terminates in the harness.

I have measured 30 amps at the fan. You need a good relay and prefferably a circuit breaker. I use a switch to control the relay. The common pole of the relay is connected to the blue wire going to the fan. The switched pole is wired to the +12V from the battery. The normally closed pole of the relay is connected to the light blue wire from the harness coming from the VCRM.

With the switch controlling the realy 'off' the relay feeds power as normal operation from the VCRM, as the factory design is a variable speed controlled by the PCM. With the switched flipped 'on', energizing the relay, power direct from the battery energizes the fan at high speed. Use heavy gauge wire for the power feeds to and from the fan, relay and battery.
 
You must log in or register to reply here.

Members online

Total: 234 (members: 1, guests: 233)
Back
Top