Electric help wiring Derale dual speed fan!

[Trippster]

Has anyone installed Derale dual speed electric fan? I called Derale and got more confused??? Hoping someone here has installed one? If not I’ll call them back.

Thank you

Ben

 

[B y r o n]

Which fan controller are you using?

 

[Trippster]

Hi, Thank you for responding

No controller so far. I was told to use one relay and one thermostat

Three wires coming from fan motor
Black to ground (easy)
Grey to 87 on relay
brown to ignition source
thermostat to 85 on relay


Im on a flight, my numbers may be wrong, I’ll have better info when I get home tomorrow

Thank you Sir

Ben

 

[Strait Cruisin]

I installed a dual speed fan with dual relays and separate temp sensors, a 195 and a 215 degree.

I think there is a schematic on my build thread but if you have any questions, feel free to ask.

 

[Engineer8000]

Do they specify what relay to use? Make sure what you use is rated for the inductive load of the fan motor. I used relays designed for 12v motors when I had the taurus fan in my truck. I originally had a rinky dink variable fan speed controller that failed quickly. I also used horton temp sensors that screwed into the block, not the one that sticks through the radiator. I think I still have all that stuff somewhere if you are interested.

 

[Trippster]

I installed a dual speed fan with dual relays and separate temp sensors, a 195 and a 215 degree.

I think there is a schematic on my build thread but if you have any questions, feel free to ask.

Do they specify what relay to use? Make sure what you use is rated for the inductive load of the fan motor. I used relays designed for 12v motors when I had the taurus fan in my truck. I originally had a rinky dink variable fan speed controller that failed quickly. I also used horton temp sensors that screwed into the block, not the one that sticks through the radiator. I think I still have all that stuff somewhere if you are interested.

Thank you for the info! Much appreciated

 

[pbgbottle]

I used continuous duty solenoids instead of relays they just seemed more durable in an off-roader. I have run mine just on a toggle for the last 15 years I don’t drive my rig That much anymore and had never got around to adding a temp sensor I just turn it on and leave it ,three way toggle so flip switch down for low speed flip switch up for high speed lazy man design. Flip switch off to cross a deep river or stream. ,, no fan spinning ,, I don’t mind mind the fan runnnig continuously the thermostat still keeps the old girl at its proper operating temps.
I do have to keep an eye on temp just in case I need to flip it onto high speed to bring temps down. ,but so far I’ve never had an issue with not having a controller

 

[Trippster]

I used continuous duty solenoids instead of relays they just seemed more durable in an off-roader. I have run mine just on a toggle for the last 15 years I don’t drive my rig That much anymore and had never got around to adding a temp sensor I just turn it on and leave it ,three way toggle so flip switch down for low speed flip switch up for high speed lazy man design. Flip switch off to cross a deep river or stream. ,, no fan spinning ,, I don’t mind mind the fan runnnig continuously the thermostat still keeps the old girl at its proper operating temps.
I do have to keep an eye on temp just in case I need to flip it onto high speed to bring temps down. ,but so far I’ve never had an issue with not having a controller

Oooooo, I like that option! Sounds to easy. I may use that as my fallback design if I can’t get this to work. Thank you for the great ideas!!!

Ben