Electric fan install

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Fishbait17

Not-quite-so-new-guy
Oct 16, 2019
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8
What up guys I am installing An electric fan. I just wanted to know if anyone new a close 12v ignition source close to the radiator. I’m just trying to keep from running a lot of wire thanks.
 

454GrandPrix

Master Mechanic
Jul 27, 2016
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Lehi, Utah
I just wanted to know if anyone new a close 12v ignition source close to the radiator. I’m just trying to keep from running a lot of wire thanks.

Just use the battery itself. An electric fan requires a relay to handle the current, so you're already tapping into the battery as is. Run your beefy 'high power' input wire (with a fuse!) from the battery to terminal 30 of the relay, and also attach a very short smaller wire from that same terminal to go to the 'low power' relay trigger (either terminal 85 or 86). Run a beefy wire from the 'high power' output (terminal 87) to your fan power input. Finally, run a small ground input wire from the remaining 'low power' terminal (85 or 86) to whatever is going to trip/activate the fan. It is very easy to hide one thin wire.
 
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57 Handyman

Master Mechanic
Feb 6, 2017
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454GP, thanks for the very thorough and detailed information on the best way to wire E-fans. I plan to do a similar install on my '87 El Camino and this information will be perfect and very useful.
 
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Fishbait17

Not-quite-so-new-guy
Oct 16, 2019
41
14
8
Just use the battery itself. An electric fan requires a relay to handle the current, so you're already tapping into the battery as is. Run your beefy 'high power' input wire (with a fuse!) from the battery to terminal 30 of the relay, and also attach a very short smaller wire from that same terminal to go to the 'low power' relay trigger (either terminal 85 or 86). Run a beefy wire from the 'high power' output (terminal 87) to your fan power input. Finally, run a small ground input wire from the remaining 'low power' terminal (85 or 86) to whatever is going to trip/activate the fan. It is very easy to hide one thin wire.
See I was going to do that but the company said not to because this fan has a thermostat sensor that activates when the coolant temperature hit 185 and deactivate when the coolant hots 165. I am suppose to run the 12v ignition wire so in know to stop running when the engine off. Not trying to say anything against what you said because that is what I was going to do but when I learned what I just said I decided I probably need to go ahead and run the wire. So that’s where I’m at thank you tho for your input it sincerely helps.
 

pontiacgp

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Mar 31, 2006
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Kitchener, Ontario
See I was going to do that but the company said not to because this fan has a thermostat sensor that activates when the coolant temperature hit 185 and deactivate when the coolant hots 165. I am suppose to run the 12v ignition wire so in know to stop running when the engine off. Not trying to say anything against what you said because that is what I was going to do but when I learned what I just said I decided I probably need to go ahead and run the wire. So that’s where I’m at thank you tho for your input it sincerely helps.

just wondering if the company gave you installation instructions why you asked the question and then tell the helpful member he wasted his time..... :unsure:
 
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Fishbait17

Not-quite-so-new-guy
Oct 16, 2019
41
14
8
just wondering if the company gave you installation instructions why you asked the question and then tell the helpful member he wasted his time..... :unsure:
Sorry bro. All the instructions told me was to wire it to a 12v ignition source it didn’t tell me where so I was asking the kind people on g body form if anyone knew of a close 12v ignition source to the radiator. Sorry if I upset you that was not my intention.
 

pontiacgp

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Mar 31, 2006
29,270
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Kitchener, Ontario
Sorry bro. All the instructions told me was to wire it to a 12v ignition source it didn’t tell me where so I was asking the kind people on g body form if anyone knew of a close 12v ignition source to the radiator. Sorry if I upset you that was not my intention.

I would trust the guys here before an instruction sheet or even a helpline.....didn't mean to offend you... :)

what temperature thermostat are you running, the switch you have kicks in at a low temperature and shuts down at 165.....
 

565bbchevy

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Aug 8, 2011
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Sorry bro. All the instructions told me was to wire it to a 12v ignition source it didn’t tell me where so I was asking the kind people on g body form if anyone knew of a close 12v ignition source to the radiator. Sorry if I upset you that was not my intention.
You can still wire to the ignition as your trigger wire and draw the main power from a relay as described, if your thermal switch is a ground that can be used for the relay.
 
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pontiacgp

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Mar 31, 2006
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