Electric fans wiring options..

[jcblue]

I bought a set of electric fans from classic heartbeat.. Nice setup.. And I have my truck wired with american autowire classic update kit.. My question is.. Will it make a difference if I wire the fans to the saw kit that has a fan wire that is basically an ignition wire, or wire it through a thermostat that is supplied in the fan kit from WES. The fans are the only fans, I do not have one on the motor.

[Davidf]

I bet those fans are going to make a lot of noise. I would wire them through a thermostat controlled relay.

[michael bustamante]

yup definatly go thru a relay. and run the power wire directly to the battery if you can.
you could also run a secondary turn on to a toggle switch in case the temp switch ever fails

[jcblue]

They are not that loud.. I don't think they are as loud as a mechanical fan on motor..

[MagmaJct]

I've seen how modern vehicles are set up in regards to how they control their fans. They use a staged setup that toggles between, low speed, and high speed. As engine temps rise, the fans are switched on, but in series. This basically runs then at "half" speed. If the temps continue to rise, the relays toggle the fans in parallel causing them to run in "full" speed.

I discovered this when our Uplander would only turn the fans on near overheating. Turns out from the factory, someone inserted the fuse panel in the engine room at a bad angle warping the plastic connector underneath. This caused an open in the series relay. The fans therefor would never come on at their lower speed.

I found it to be an interesting concept. A way to keep noise down except for when maximum cooling is necessary.

Regards,
Mike

[D-rock1981]

I have duel fans set up for one to turn on at 190. And the second to turn on at 220 I think. Wired through a dpdt relay and main power wire ran direct to battery.