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sunline1

Northeastern Pa

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Posted: 05/23/12 11:03am

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Have a 97 454 cu k2500 4 wheel drive pickup.

Is the aux cooling fan (Radiator), suppose to run when the air conditioning is on ?

Mine is not running.

If so any tips/advise to check it out.

Thanks

Sunline1

NewsW

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Posted: 05/23/12 11:15am

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Electric or engine driven?

BenK

SF BayArea

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Posted: 05/23/12 11:24am

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Here are pictures of my GMT400 7.4L Sub while in the shop after nailing a Land
Rover which jumped a stop sign

Is this the aux fan?

Yes, it is supposed to be on whenever the AC is on.

check the fuse first

-Ben Picture of my rig
1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...

sunline1

Northeastern Pa

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Posted: 05/23/12 11:35am

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Yes that's the aux cooling fan which is electric, that I was refeering to will check the fuse.

thanks

Sunline1

NewsW

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Posted: 05/23/12 11:40am

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Unplug it, apply battery voltage to it and see if it runs.

If yes, start working backwards to the fuse first, then suspects as needed.

502_Jimmy

Richmond VA

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Posted: 05/23/12 11:42am

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sunline1 wrote:

I have two 454 vehicles of that era. '99 K2500 suburban and a '96 K3500 truck. Neither fan comes on just with the A/C. Computer has to sense a certain temperature/heat load for it to come on in my trucks.

Hope this helps.
John

sunline1

Northeastern Pa

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Posted: 05/23/12 11:44am

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Is the fuse an "inline" fuse or is it in the fuse panel inside the truck ?

NewsW

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Posted: 05/23/12 11:51am

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Since you had a crash, wiring can be damaged and shorted.

Suspect but do not know -- it is probably a dash fuse.. check the manual.

Turtle n Peeps

California

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Posted: 05/23/12 12:26pm

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Did I miss it? Where did the OP say he was in a crash?

~ Too many freaks & not enough circuses ~

"Life is not tried ~ it is merely survived ~ if you're standing
outside the fire"

Trail-Mate

Frederick, MD

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Posted: 05/23/12 01:03pm

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My 93 K2500 would come on with AC and I think the Van 95 Chevy 1 ton with 454 would also come on with AC.

1997 Ford F250 Extended Cab, 7.3 Diesel, 8 foot bed.
Reese 16K Hitch
(Moved into Shed) Hensley Arrow
Jordan Brake Controller, Hensley TruControl Gold Shelved.
Open Range 5th Wheel, Roamer RF392 BHS

Happy Camping !!