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...