Electric Cooling Fan How-to - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Restrorob · 07-03-2011, 09:54 AM

Quote:

Originally Posted by bikerbomber

And where did you wire the hot lead into so the fan only powers while the key is on? I am having the same issue and thought the fusable links would only come on when the key is turned, but the fan remains on after the key is removed. Thanks for the help!

Any switched power wire should work fine, I'd try to locate a larger 14 Ga wire over a 16-18 Ga....

I'm yet to get my fan installed, Just have too many other things going on right now !

Here's a typical single relay diagram for non-AC;

Here's the diagram I will use for running AC;

Also, I'll be using a circuit breaker instead of a fuse. I'd rather custom taylor my own fan harness to the way I want, Rather than try fitting/butchering
some high dollar pre-made kit.....

bikerbomber · 07-05-2011, 01:01 AM

Having trouble finding where exactly to connect it. I can't seem to locate a switch-able hot 12v power wire. Could you tell me exactly where the best spot would be? I have bee looking over wiring diagrams and the truck itself all afternoon and I am sure its right in front of me but I can't see it. Thanks!

Restrorob · 07-05-2011, 07:06 AM

You've got a under-hood fuse/relay panel on the left fender well right ?

There's at-least two relays in that panel (fuel pump/AC) that are activated with switched power, Remove the panel from the fender then flip it up side down. You will find those and likely a few more, Just tap into one with a three way connector. The fan relay doesn't pull that much working amperage.....

bikerbomber · 07-05-2011, 10:53 PM

Hey, just wanted to thank you for the advice. It worked well and I avoided drilling through the firewall just to get to a switch-able circuit. I used the pink/black wire off the fuel pump fuse and so far so good.

Restrorob · 07-06-2011, 07:07 AM

Good deal.....

elf w/capital T · 09-13-2015, 04:18 PM

My fan pushes forward into grill and my ac condenser....

Did I miss something to make the fan pull into the engine bay?

What's honestly better?

*gmachinz* · 09-13-2015, 07:26 PM

You've got your fan leads reversed. You should always have the fan mounted on the inside and have it pull air towards to motor. Putting the fans on the outside creates too much restriction @ idle/low speed.

elf w/capital T · 09-13-2015, 08:09 PM

Rodge. I shall swap terminals. Thanks!!

07-05-2011, 01:01 AM	#27
bikerbomber Registered User Join Date: Feb 2007 Location: Sierra Vista, AZ Posts: 306	Re: Electric Cooling Fan How-to Having trouble finding where exactly to connect it. I can't seem to locate a switch-able hot 12v power wire. Could you tell me exactly where the best spot would be? I have bee looking over wiring diagrams and the truck itself all afternoon and I am sure its right in front of me but I can't see it. Thanks! __________________ If all men are created Equal* does that mean we are all artifical?

07-05-2011, 07:06 AM	#28
Restrorob The One And Only !!! Join Date: Jan 2007 Location: Hole in the woods Florida Posts: 4,567	Re: Electric Cooling Fan How-to You've got a under-hood fuse/relay panel on the left fender well right ? There's at-least two relays in that panel (fuel pump/AC) that are activated with switched power, Remove the panel from the fender then flip it up side down. You will find those and likely a few more, Just tap into one with a three way connector. The fan relay doesn't pull that much working amperage..... __________________ 93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz ! The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. *"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!*

07-05-2011, 10:53 PM	#29
bikerbomber Registered User Join Date: Feb 2007 Location: Sierra Vista, AZ Posts: 306	Re: Electric Cooling Fan How-to Hey, just wanted to thank you for the advice. It worked well and I avoided drilling through the firewall just to get to a switch-able circuit. I used the pink/black wire off the fuel pump fuse and so far so good. __________________ If all men are created Equal* does that mean we are all artifical?

07-06-2011, 07:07 AM	#30
Restrorob The One And Only !!! Join Date: Jan 2007 Location: Hole in the woods Florida Posts: 4,567	Re: Electric Cooling Fan How-to Good deal..... __________________ 93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz ! The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. *"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!*

09-13-2015, 04:18 PM	#31
elf w/capital T Registered User Join Date: Feb 2011 Location: North Carolina Posts: 993	Re: Electric Cooling Fan How-to My fan pushes forward into grill and my ac condenser.... Did I miss something to make the fan pull into the engine bay? What's honestly better?

09-13-2015, 07:26 PM	#32
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: Electric Cooling Fan How-to You've got your fan leads reversed. You should always have the fan mounted on the inside and have it pull air towards to motor. Putting the fans on the outside creates too much restriction @ idle/low speed.

09-13-2015, 08:09 PM	#33
elf w/capital T Registered User Join Date: Feb 2011 Location: North Carolina Posts: 993	Re: Electric Cooling Fan How-to Rodge. I shall swap terminals. Thanks!!



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