View Full Version : E-fan question (4.6l)
07-25-2008, 09:44 AM
I installed two 16" 3000 cfm E-fans on the truck, but since it's been in the paint shop, i haven't had time to drive and tweak the settings. I'm running a Derale dual controller that uses a probe temp sensor.
1 fan runs off the temp. sensor the second runs off an aux. line that can either be connected to a switch, or the a/c clutch so it goes on when the a/c goes on.
if i have yet to hook up the aux. line to a switch or the a/c clutch, will i be ok to drive it? The guys at Derale said the factory settings for the fan to switch on is 180, and because i have a 195 thermostat, i should turn it up a bit.
07-25-2008, 09:49 AM
turn it up just a little. Also the Aux you should have a manual switch in the cab and the automatic with the A/C Clutch. The switch would be an ON-OFF-ON, Auto Off On.
07-25-2008, 09:58 AM
the aux. line off the controller goes to any power source you want, either a switch in the cab, or the a/c clutch, not both.
i guess what i'm asking is under normal driving, both highway and backroads, that one fan should cool it, right? (not using the a/c)
07-25-2008, 11:06 AM
Well I suggest the manual override for this reason, Jake(timberwolf) on our way to stone mountain highway speeds lost his primary E-fan, and could not override so he had no Fan. I suggest you run a relay kicker from a constant switched power source and also a kicker from the A/C clutch. There for you can leave the switch in the auto position and when the Clutch kicks in the secondary fan will kick, or if you want to warm it up you can leave it off. Or if you are getting hot and are not using the A/C you can kick the fan on by just flicking the switch, so there for you have both options.
07-25-2008, 11:11 AM
that makes sense. thanks.
do you happen to know which wire coming off the a/c i would use for the power?
07-27-2008, 12:40 AM
i am not sure, but a relay draws almost no power so you do not need to get all complicated. i would look in your owners manual but most likely not there. google it.
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