secondary aux fan

[dsltrc]

has anyone ever installed an electric fan in front of the standard fan? attaching it to the radiator using a fan mounting kit and wiring it thru a relay to turn on when the compressor kits on???

 

[95BlackTahoe]

actually, gm did offer one...look in heavy duty trucks like a 3500, or a diesel...or buy it new...it is certainly cheap enough. holes are already there...I did one a long time ago and used it when the ac came on.

auxilary fan, condensor

Shawn

 

[Monstar_est87]

@ shawn any photos of ur setup..? How did u wire it up..? Through the pcm...? Or relays and a switch..?

 

[SunlitComet]

it was used on the heavy frame trucks withe big block or diesel engines to provide increased cooling while not letting the radiator heat to much from heat coming from condenser. partial provisions were made but were not complete in the Tahoe iirc. it was designed to be relay controlled and fused in the under-hood power box. the relay was triggered by a refrigerant temperature switch on the condenser tubing. you can install the oem aux fan and use the +feed to compressor clutch to trigger a relayed circuit of your choosing. you can get the gm part here. http://www.amazon.com/ACDelco-15-8686-Auxiliary-Radiator-Motor/dp/B0012PM154/

---------- Post added at 04:22 PM ---------- Previous post was at 04:20 PM ----------

you might find afterwards that extra electrical power may be needed. it will be required if you have efans on radiator already in place of oem clutch fan system.

 

[Monstar_est87]

Hummm... Hey sunlit would u happen 2 have aux fan diagram..? Or kno what other part #s ect... Im gonna shoot 4 this...

 

[SunlitComet]

you will most likely need to make your own harness system like i mentioned as the provisioning for the system was not completely included in the Tahoe build up.

Electrical Diagrams Cooling Fan

Cooling Fan

 

[SunlitComet]

Wouldn't you know it bolt screws for fan are gm 12337828

---------- Post added at 12:53 PM ---------- Previous post was at 12:51 PM ----------

pig tail thhat attaches to fan on body side i believe. gm 12126452.

---------- Post added at 01:01 PM ---------- Previous post was at 12:53 PM ----------

and was even optioned on the small block too as last ditch effort for engine coolant circuit it looks like. triggered by a coolant switch and relay. the switch was installed on right bank. opposite of the left bank where the sensor over there fed the gauges. The aux trigger switch on right bank is gm 12554958. no details on what the right back switch triggers at.

 

[Monstar_est87]

Thank u sunlit ur the man... I really wanna see about getting this done... I found the fuse location under the hood but im not sure if theres a pigtail hookd 2 it...

 

[SunlitComet]

hence not fully provisioned in the Tahoe wiring harness.

 

[Monstar_est87]

I could have sworn I seen a wiring schematic somewhere around here...

 

[SunlitComet]

you need it again?

 

[Monstar_est87]

Yes please...

 

[SunlitComet]

look above and print it or save it this time.

 

[Monstar_est87]

Sweet... Got it, thank u...

 

[NOVAhoe]

what about just running it to a switch? For the price of that oem fan i really want to do that to, but i think it would be cool to have it on a switch, does anyone know how much power that fan draws?

 

[SunlitComet]

What ever strokes you cylinder walls just use a relay controlled circuit.

 

[Monstar_est87]

So i was looking at a 3500 today and saw this...

So does the aux fan necessarily have to be on the passengers side..? Bcuz my LIMITED has the oil cooler on the passenges side and i dont wanna go through the hassle of moving everything over...
So again does the aux fan need to be on the passengers side? Or does it not matter..?

 

[SunlitComet]

Makes no difference instill blows thru the same pieces. Nice setup you found there. Oil, ps and looks like two trAnny coolers, freon and coolant. Need to get that's ps cooler myself and hydro booster.

 

[Monstar_est87]

Yea this thing had it all... At first i wasn't sure wat the hell they were then followed the lines boom tranny coolers... Went back the next day to grab the steering box and hydro boost and sum idiot cut every line and took the gear box... But heres a pic

O another thing... I traced the wires all the way back near the fuse box and lost it in a cluster coitus of wires in the main harness... I was looking for the relay and trigger for this fan but got nothing... Sunlit i tried saving ur diagram but i shows 1 image and downloads as another... Any chance u can send it 2 me..? Please please please..?

 

[SunlitComet]

which diagram again? and do i get the hydro-boost in return?