wiring thermo fan to switch

leayr · Post by **leayr** » Sat Nov 19, 2011 7:44 am

hi just wondering how u wire thermo fan to a switch that's safe and not gunna blow out other accessories

zoomzoom · Post by **zoomzoom** » Sat Nov 19, 2011 8:26 am

run direct power from alt or battery to a toggle switch but if you wire it up to the stock loom you'll be rite I run two slimlines off the stock loom

zoomzoom

Post by **tassuperkart** » Sat Nov 19, 2011 3:33 pm

NEVER run full battery power to pissy flick switches and ask them to handle fan power. Usual startup amperage for fans is 20 amps plus!
Your asking for trouble running power wires thru firewalls here and there. so many wirting fires are started by running battery power wires everywhere.

Always use a negative side switched relay to handle the fan duties powered directly off the battery via a decent fuse and then run a single light guage wire in from the relay pull-in coil, thru the flick switch and then to ground under the dash.
Short this wire and nothing more than the fan runs.

L8r
E

sgs · Post by **sgs** » Sat Nov 19, 2011 8:07 pm

to be honest you really shouldnt run a electric fan off a switch, its better to have a thermo switch thingy that turns on when the coolent gets hot. I have run fans without this but there has been a few OH FUCK moments.

I would wire in a switch if your going to do a sick burnout or something though. but have the thermo switch as a back up.

Post by **tassuperkart** » Sat Nov 19, 2011 8:53 pm

What HE said.
E

leayr · Post by **leayr** » Sun Nov 20, 2011 10:04 am

i looked at them got that probe that gose into the hose are they any good or just asking for leaks???

Post by **tassuperkart** » Sun Nov 20, 2011 12:03 pm

Well, that type is a bandaid at best and are prone to leaking.
Why not just use the stock fan thermal switch?

If you use this stock setup to trigger a relay on the negative side, you can then just add a dash switch aqs an overide if you feel you need it.
Interestingly, the stock setup does not use a fan relay and that thermal switch down the side of the radiator does all the power switching....curious.

The stock cooling system is large and reliable. Big 3 core crossflow radiator and decent sized pusher fan/s so if everything is working, I cannot see how an ET would overheat in any circumstances IF evrything is in order that is.
Extra fans/switches are pretty much redundant and just adding cimplications for the sake of it.

L8r
E

sgs · Post by **sgs** » Mon Nov 21, 2011 7:32 pm

Even wrote
"The stock cooling system is large and reliable. Big 3 core crossflow radiator and decent sized pusher fan/s so if everything is working, I cannot see how an ET would overheat in any circumstances IF evrything is in order that is.
Extra fans/switches are pretty much redundant and just adding cimplications for the sake of it."

fit a bigger Turbo?