im trying to figure out what part number this wire is. it comes from the fan, and there is a clip for it on the fan shroud. its about 20 inches long, and theres 5 wires in it. and since its got cut, the water, tranny, and a/c all get hot while idleing. but when driving, its fine. so i figure it controls the clutch on the fan. this is on a 2003 2500 diesel. thanks for any info. i went over wiring diagrams and couldnt figure out which one it was.

 

You will find the fan schematic on page 8w-30-79. Listed under Vistronic Fan Drive.

MikeyB

 

No separate part unfortunately. Part of the fan clutch. Most guys are seeing this when one of two things happens. Driving trhu high water will push the wires back into the fan and cut then, or when the fan clutch is going bad, the sensor wires will grab and rip them out of the holder and back into the fan as well. Most guys spice them back together and zip tie them several places to help keep it from happening again. I'd not zip tie them to the radiator if it were me. I'd rather replace a fan clutch, than a fan clutch and a radiator! I could see the zip ties ripping core tubes right out of the radiator!

 

awsome, thanks. i just found a clutch for 400 bucks. does that sound about right? seems like, double what i was thinking.

 

IIRC it is like 360 or so from the dealer, so thats not too far off.

 

we recently had one replaced on our '03 under warranty. the price was just under 400 if we had to pay for it...

 

i decided to just re do the wiring, instead of replacing the whole thing. can someone explain how to take the clutch fan off. i cant really figure it out, and i dont wanna mess anyhting up. im used to working on old chevys, not these new diesels. thanks.

 

5.9L DIESEL
CAUTION: If the electronically controlled viscous fan drive is replaced because of mechanical damage, the cooling fan blades should also be inspected. Inspect for fatigue cracks, or chipped blades that could have resulted from excessive vibration. Replace fan blade assembly if any of these conditions are found. Also inspect wiring harness and connectors for damage.

Disconnect the battery negative cables.
Remove fan shroud-to-engine bracket nuts (1).(ENGINE MOUNTED FAN SHROUD)
Disconnect electronically controlled viscous fan electrical connector (4) at lower fan shroud bracket.
Remove wiring bracket -to-lower fan shroud bracket mounting bolt (2).
Remove fan drive wire harness support from fan sharoud.
CAUTION: Do not remove the fan pulley bolts. This pulley is under spring tension.

The electronically controlled viscous fan drive/fan blade assembly is attached (threaded) to the fan pulley shaft (Fan Blade/Viscous Fan Drive - 5.9L Diesel). Remove the fan blade/fan drive assembly from fan pulley by turning the mounting nut counterclockwise (as viewed from front). Threads on the viscous fan drive are RIGHT-HAND. A 36 MM Fan Wrench can be used. Place a bar or screwdriver between the fan pulley bolts to prevent pulley from rotating.
NOTE: It may be necessary to loosen the top two fan shroud brackets. Removal of the engine mounted fan shroud brackets is not necessary unless removing or installing the engine.

Collapse fan shroud toward front of vehicle and remove fan drive/fan blade and fan shroud as an assembly.
CAUTION: The electronically controlled viscous fan drive is vibration and impact sensitive, especially at the electrical connectors. Do not drop the unit.

Remove the six fan blade-to-viscous fan drive mounting bolts.
Inspect the fan for cracked, chipped or damaged fan blades.

 

excellent. thank you.

 

does anyone have a wiring diagram for the fan clutch? theres a wire in there with no copper in it, it looks like some type of fabric or something. anyone know what that is? and theres 6 wires going into the plug, but only 5 coming out of it. and i cant figure it out. any help would be greatly apreciated. im kinda in a rush too. thanks.