V8 eFan to V6 eFan 2013 1500

[RedSRT4Me]

I’m not sure it will be as simple as using the DT PCM. The wiring is different from the PDC to the fan as well as the extra PCM circuit for fan speed. You would likely need a DT PDC as well as wiring harness. Then there’s the issue of using a DT PDC in a DS, I assume there not the same.

It looks like the actual PWM comes from the PDC. The speed signal is fed to the PCM which then busses the signal to the PDC for the correct PWM output.

Be better off just using an aftermarket PWM controller for it if you really wanted the PWM fan.

And normally I would say you're right but another member posted they wired up the pwm fan but the PCM with not acknowledge it. You only need 1 wire added for the pwm control. The fuse location is already there and waiting.

 

[Tach_tech]

And normally I would say you're right but another member posted they wired up the pwm fan but the PCM with not acknowledge it. You only need 1 wire added for the pwm control. The fuse location is already there and waiting.

Except the pwm fans get power straight from the battery, not actually from a connector under the PDC, I was wrong about that. The DT uses a power bus bar from the PDC. So wiring the main power feed isn’t a big deal. You would just need some wire and the battery terminal fuse which is a 100amp. Whatever fuse that guy found that is populated is likely a 60amp. I wouldn’t trust trying to use that when the trucks equipped with the factory e-fan are running 100 amp fuses.

I can’t find any actual information on how it’s controlled but I imagine it will need the PCM speed signal circuit working properly in order to have full control.

I’m just going off the wiring diagrams in the service manual and experience, but I think it’s more hassle than it’s worth to try to get it working with oe parts.

 

[crazykid1994]

Yeah I tried to get the Pentastar PWM fan to work. You can wire it in like a factory Pentastar Truck as the hemi harness is near identical but it can't be programmed. Jay Greene tried, nor could the dealer get it to fire.

Anyways the 3.7 V6 e-fan is nice, it's shrouded, cleans up the engine bay and works great with a 190 T-stat.

I am testing out a module from RpmExtreme to control the pentastar fan. He has made a module that is able to run the fan. Just need to test the module to make sure it’ll communicate with the trucks canbus system. I actually just got the module back. Sent out the pwm fan for the pentastar to them to do testing on the signal needed to control it. Also purchased their wiring harness for the fan as well. Includes an in line fuse holder

 

[Tim Garceau]

That would be a big benefit for spirited driving. Low speed between 190-200, high over 200+ would be ideal for this engine to keep the timing hot(advanced).

 

[RedSRT4Me]

Except the pwm fans get power straight from the battery, not actually from a connector under the PDC, I was wrong about that. The DT uses a power bus bar from the PDC. So wiring the main power feed isn’t a big deal. You would just need some wire and the battery terminal fuse which is a 100amp. Whatever fuse that guy found that is populated is likely a 60amp. I wouldn’t trust trying to use that when the trucks equipped with the factory e-fan are running 100 amp fuses.

I can’t find any actual information on how it’s controlled but I imagine it will need the PCM speed signal circuit working properly in order to have full control.

I’m just going off the wiring diagrams in the service manual and experience, but I think it’s more hassle than it’s worth to try to get it working with oe parts.

Good find!!! Ok definite needs are
100amp fuse to replace 60 amp
850 watt 2019 fan
Add wire or wires to complete the circuit (to be continued)
Probably still need the DT PCM to control it if CMR cannot turn on the feature with the DS PCM.

@Tach_tech anything else that you can think of that would be needed to make this with??

 

[RedSRT4Me]

I am testing out a module from RpmExtreme to control the pentastar fan. He has made a module that is able to run the fan. Just need to test the module to make sure it’ll communicate with the trucks canbus system. I actually just got the module back. Sent out the pwm fan for the pentastar to them to do testing on the signal needed to control it. Also purchased their wiring harness for the fan as well. Includes an in line fuse holder

View attachment 220597

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This is going to be the much easier route to go.

I'm torn between taking the easy route or being persistent to figure out factory pwm control on a truck that didn't come with it.

 

[Plankton]

Ooops. Wrong thread. My apologies.

 

[Tach_tech]

Good find!!! Ok definite needs are
100amp fuse to replace 60 amp
850 watt 2019 fan
Add wire or wires to complete the circuit (to be continued)
Probably still need the DT PCM to control it if CMR cannot turn on the feature with the DS PCM.

@Tach_tech anything else that you can think of that would be needed to make this with??

The biggest thing will be the pwm control from the pcm. The other wiring is pretty simple. If you can’t get the DS pcm to work with it, the DT pcm might be the only way. Even then there could be issues, since the pcm will have to be programmed for the DS, which since the DS doesn’t have that output, it still might not work anyway. Even with HP tuners, I know you can enable pwm fan control but I have no idea what output it is expecting to use, factory output or another one, or if that option technically even will work.

Honestly if it was me I would just use the aftermarket options, like crazykid is pursuing. It won’t be OE, but likely cheaper in the long run and still work just as well.

 

[crazykid1994]

It is for the pentastar fan not the ecodiesel fan but should still be adequate. The Jeep guys who do hemi swaps use the pentastar fan and this module. That’s actually how I found out about it. It uses the canbus to read engine temp, ac on, and engine rpm to determine fan speed. Not sure if it reads ac line pressure through the canbus. And not sure when I’ll get around to even testing out if it’ll read the ram pcm canbus. Not sure if Jeep and ram use different canbus.

 

[Tach_tech]

It is for the pentastar fan not the ecodiesel fan but should still be adequate. The Jeep guys who do hemi swaps use the pentastar fan and this module. That’s actually how I found out about it. It uses the canbus to read engine temp, ac on, and engine rpm to determine fan speed. Not sure if it reads ac line pressure through the canbus. And not sure when I’ll get around to even testing out if it’ll read the ram pcm canbus. Not sure if Jeep and ram use different canbus.

Pretty much all FCA vehicles use the same bus systems. The Can C will be the one used for the fan.

 

[crazykid1994]

Pretty much all FCA vehicles use the same bus systems. The Can C will be the one used for the fan.

Yes but problem is if the signal is the same or not. May be the same canbus but different programming. The person I spoke to at RpmExtreme told me even though it’s both canbus it could be different reading for it depending on programming. Hopefully I get a chance soon to test it out.

 

[RedSRT4Me]

It is for the pentastar fan not the ecodiesel fan but should still be adequate. The Jeep guys who do hemi swaps use the pentastar fan and this module. That’s actually how I found out about it. It uses the canbus to read engine temp, ac on, and engine rpm to determine fan speed. Not sure if it reads ac line pressure through the canbus. And not sure when I’ll get around to even testing out if it’ll read the ram pcm canbus. Not sure if Jeep and ram use different

The biggest thing will be the pwm control from the pcm. The other wiring is pretty simple. If you can’t get the DS pcm to work with it, the DT pcm might be the only way. Even then there could be issues, since the pcm will have to be programmed for the DS, which since the DS doesn’t have that output, it still might not work anyway. Even with HP tuners, I know you can enable pwm fan control but I have no idea what output it is expecting to use, factory output or another one, or if that option technically even will work.

Honestly if it was me I would just use the aftermarket options, like crazykid is pursuing. It won’t be OE, but likely cheaper in the long run and still work just as well.

If I order a PCM from HP tuners for the DT model and give all my vin info and such won't the PCM just take the info and the fob bypass security to start the truck?? I mean besides vin, engine code, and trans code what else is needed? Guess an email to HP is in order.

 

[Tach_tech]

The PCM will need to be flashed to the latest software for your truck. VIN programmed, ETC learned, key code learned. The issue is that the software and configuration for your truck doesn’t include pwm for the fan, so it likely won’t be enabled. Which is where hopefully enabling it with HP tuners will help. Again though since nobody we are aware of have got it to work yet it’s kind of a crap shoot wether it will actually work.

 

[Tim Garceau]

Use diablo guys will have to just manually turn it on/off with a switch! Flying a plane can’t be that much different compared to the latest tech on these trucks.

 

[Tach_tech]

Use diablo guys will have to just manually turn it on/off with a switch! Flying a plane can’t be that much different compared to the latest tech on these trucks.

Except when your plane brakes down you can’t just pull over to the side of the road lol

 

[crazykid1994]

for anyone interested. The module works. Just need to tap the canbus and test compatibility. Hopefully it reads. This thing puts out a huge amount of air. Feels like double the 09-12 v6 fan.
Edit: canbus still not communicating. Not sure which signal is not reading. It’s supposed to read engine rpm, ac on, and registered engine temp. Emailed RPMExtreme. If anyone is in Alabama and can take a trip to Gardendale so this guy could read the computer to do testing would be awesome and really helpful. I’m in south Florida so to far of a trip currently. I could be willing to part with the module at half the price than what he sells them for. You would just need to supply a fan as shipping this fan is insane and not worth the price. Plus it’s got a broken tab and I’d rather not send out a broken fan. I’m closing on a house and can’t afford to spend any more money. Pm me if interested.
Edit: well I spoke with RpmExtreme already. Amazing and fast customer service. He wants me to send it back so he can try one more thing. Hopefully this works. Will keep everyone up to date. He wants to try changing the canbus signal that the module is looking for. Thinks he has it figured out.

 

[RedSRT4Me]

for anyone interested. The module works. Just need to tap the canbus and test compatibility. Hopefully it reads. This thing puts out a huge amount of air. Feels like double the 09-12 v6 fan.
Edit: canbus still not communicating. Not sure which signal is not reading. It’s supposed to read engine rpm, ac on, and registered engine temp. Emailed RPMExtreme. If anyone is in Alabama and can take a trip to Gardendale so this guy could read the computer to do testing would be awesome and really helpful. I’m in south Florida so to far of a trip currently. I could be willing to part with the module at half the price than what he sells them for. You would just need to supply a fan as shipping this fan is insane and not worth the price. Plus it’s got a broken tab and I’d rather not send out a broken fan. I’m closing on a house and can’t afford to spend any more money. Pm me if interested.
Edit: well I spoke with RpmExtreme already. Amazing and fast customer service. He wants me to send it back so he can try one more thing. Hopefully this works. Will keep everyone up to date. He wants to try changing the canbus signal that the module is looking for. Thinks he has it figured out.

On paper it is double the air. 850 vs 450cfm

I gotta get this mod now. Just use this little magic box instead of trying to get OEM to work.

 

[crazykid1994]

On paper it is double the air. 850 vs 450cfm

I gotta get this mod now. Just use this little magic box instead of trying to get OEM to work.

If you’re close to Gardendale Alabama than RpmExtreme could use your truck to test the canbus signal. He’s going to try changing it on my module so I can try again. Hopefully it works. If not he will need a truck to test the canbus signal in order to reprogram. The module has a high and low setting as well for manual control if needed.
http://www.rpmextreme.com/Product/283/HEMI-JK-PWM-FAN-CONTROLER.aspx
Edit: I have someone willing to do the testing. Hell yea. This will be sweet if it works out.

 

[kidmandudebro]

How about this, and maybe Moes Performance could chime in...

A) No Tune
B) 180 tstat
C) shutter delete
D) v6efan install
E) Mech fan removed

will this work to turn fan on early?

http://www.moes-performance.com/Flex_a_Lite_Variable_Speed_Controller_p/31165.htm

 

[Tim Garceau]

Just wire that thing in with only the high speed hooked up and be done with it. None of this half ass cooling is needed when I’m working it hard!

Might need some circuit upgrades depending on the amp draw however.