RTLINGR2
Member
The factory fan harness grounds the fans on the frame rail behind the driver side front bumper.
Electric Fan Conversion Question
- Thread starter Dantheman-2003
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Matthew Jeschke
Full Access Member
Where did you source your fans from? I'm looking at RockAuto and they don't seem to have a OEM fan assembly. My plan is to buy part from 2005 1500 Silverado catalog for my 2001 Tahoe... Unless there's a better part to spec.
Tonyrodz
Resident Resident
I've read the newer model fans are better as they have more blades for cooling. K5L maybe? Pretty sure @Doubeleive has alot of knowledge on this subject.
700w motors on the k5l vs 500w on the standard, fan blades vary.
mattbta
Full Access Member
15780789 is the older 7/9 bladr K5L 700w assembly. Got mine on eBay. Seemed to work better than the newer 5/5 blade 700w for me in Texas summers at idle. They all have a significant draw. Need at least the 145a alternator but more is better.
RTLINGR2
Member
I converted my 04 2500 sub to e-fans. I sourced the fans from junkyard. Pulled the fans and harness from same vehicle. Split the forward lighting harness apart and grabbed the OE complete fan harness with factory fuse/ relay blocks. If the fan motors later go bad, you can source just the motors and blades. No need to buy a complete housing assembly.
Currently I have 2 harness in the sub, the oe for when I get the ecm programmed. Its stubbed out ready to go.
The second harness is out of an 2006 to 2010 Impala police car. It uses external relays and power source **** fuses. I currently have both fans wired through two relays not three. They both are wired for high speed only and through the ac request signal. So technically they will only operate when the the compressor is on. I know its not the correct way, but it works.
Matthew Jeschke
Full Access Member
So KL5 cooling fan package from a GMT900 chassis? Fitment is the same on GMT800?
Tonyrodz
Resident Resident
I'm 99.99% sure it is. There's been a few discussions here talking about the nnbs fans work on the nbs with no issues.
yes same as the radiators, although parts guys will stand on there head and swear they wont swap lol
a 00 will swap to a 14 and a 14 will swap to a 00
same as the alternators a 2 pin will swap from 05-2020, or vica versa and a 4 pin can be made to work on a 2 pin with a little electronic adapter.
a electric fan shroud (outer fitment) and the power connector for the motors is the same from 04/05 to 2014
and the electric fan shroud will fit 00-14, that's why you can easily change a non electric to electric and if you really wanted to you could change a electric to clutch fan
the differences are the inner shroud design to fit the blades/motor differences a 500w motor mounts different than a 700w motor and the blades will vary as well
there is a few different designs, but all "fit" the same on the radiator
RTLINGR2
Member
This wasn't my post, but thats good info. Thanks!
ya, sometimes there is cross posting I was replying to "fitment" question
RTLINGR2
Member
I was following along.
Matthew Jeschke
Full Access Member
Forgive me if this was already covered in here. Skimmed a couple times but not sure I caught everything. Two questions:
Q1 aftermarket junction block: I think the intention in this post was to swap in factory wiring. I don't want to do that. My plan is to use an aftermarket junction block. I have a handful of things to wire up aside from this. Curious if anybody has experience with a good aftermarket junction block they would recommend? Something with provisions for say a dozen or so items (air compressor, off road lights, etc. etc. etc.) and is weather sealed for under the hood?
Q2 Fan shroud: I've not looked to closely as the fan setup recently. I don't know if the fans have a provision to hold the upper radiator hose? Currently that's done by my mechanic fan shroud. Otherwise, do I need a different shroud to set on top of the fans to hold that hose?
Q1 aftermarket junction block: I think the intention in this post was to swap in factory wiring. I don't want to do that. My plan is to use an aftermarket junction block. I have a handful of things to wire up aside from this. Curious if anybody has experience with a good aftermarket junction block they would recommend? Something with provisions for say a dozen or so items (air compressor, off road lights, etc. etc. etc.) and is weather sealed for under the hood?
Q2 Fan shroud: I've not looked to closely as the fan setup recently. I don't know if the fans have a provision to hold the upper radiator hose? Currently that's done by my mechanic fan shroud. Otherwise, do I need a different shroud to set on top of the fans to hold that hose?
Tonyrodz
Resident Resident
Pretty sure the electric fan shroud holds the upper hose like the mechanical shroud does. It's been awhile since I've looked under my hood. FYI--You can use the nnbs electric fans too. They're the same.
Not sure about #2 but as for the hose- use the same clip, it pops into the shroud on the electric fan.
Nice supercharger….
Yessir, works very well.
Matthew Jeschke
Full Access Member
Sweet one less thing to buy.
I'm researching aftermarket junction blocks though. DARN I didn't realize something so simple would be so $$$$$
I am convinced I'd like a separate box for aftermarket / non-factory stuff but not ready to spend $600 for a few relays and fuses.
I wonder if anybody has took one off another vehicle and repurposed it? I'd like to stick with the mini blade fuses and same relays. I wonder if perhaps a similar year GM car might be a good candidate?
Otherwise, this would be a great project for a 3d printer and custom circuit board.
I'm researching aftermarket junction blocks though. DARN I didn't realize something so simple would be so $$$$$
I am convinced I'd like a separate box for aftermarket / non-factory stuff but not ready to spend $600 for a few relays and fuses.
I wonder if anybody has took one off another vehicle and repurposed it? I'd like to stick with the mini blade fuses and same relays. I wonder if perhaps a similar year GM car might be a good candidate?
Otherwise, this would be a great project for a 3d printer and custom circuit board.
I went with the factory add-on fuse box and wiring harness myself after trying an aftermarket one that was purpose-built for the conversion. I think it was a Nelson. It melted at least 3 times, even after I upgraded the relay block itself to a beefier block with bigger wiring. There’s something about the factory one with the solid-state looking relays that just works. The last time the aftermarket one melted was in 110* temps a long way from home, and I had to get a tow of about 150 miles. Lucky I had AAA+. There’s more to it than just relays and fuses.
Similar threads
