5th Gen Seats into a 4th Gen?

[Ramman2]

Honestly, I've essentially given up on the cooled seats.

The 4th gen HSM uses a two wire system for the fans, and adjusts voltage for speed, i.e. 8v for low, 12v for high.

The 5th gen cooling fan motors use a three wire system, constant 12vdc, ground, and a PWM speed control.

So, I can either swap in 4th gen seat cooling motors (good luck finding those at reasonable prices), find a universal fan motor that bolts up (unlikely); or find an alternate control system for the 5th gen cooling fan motors (something like a universal PWM controller, but I tried one and wasn't smart enough to figure it out).

Supposedly, somehow in the TCM-2800 (I'm running Russel's 8HP70 swap kit in my '12 Ram, and ditched the 545RFE), I can also program PWM outputs. But again, I'm not really saavy enough to figure it out - there isn't a lot of info out there on it; and I'm not motivated enough to figure it out on my own vs. other projects.

It would be nice to have, but in Ohio, it's not a super important option.

Thanks for the reply. I’ll probably pass on trying to get it to work as well but if I do end up getting them to work I’ll definitely let y’all know

 

[JohnVill]

I just wanted to give an update on my build w/ 5th Gen 1500 Laramie Longhorn interior. I was able to get the seats in with power, but I’m still trying to find any solution for the heated/cooled function to work. I also have the center console fully installed and the door panels from a 5th Gen 2500 was a direct fit.

 

[emjohn4]

So, I got the cooled seats working.

I used a PWM controller to make it work. The output from the 4th gen HSM goes to the PWM controller, and the output of the PWM controller goes to the 5th gen fans.

I had to wire the fans directly to the PWM controller - since in the 5th gen, the fans have constant +12vdc when the ignition is on.

So, it's now 100% functional!

 

[emjohn4]

I just wanted to give an update on my build w/ 5th Gen 1500 Laramie Longhorn interior. I was able to get the seats in with power, but I’m still trying to find any solution for the heated/cooled function to work. I also have the center console fully installed and the door panels from a 5th Gen 2500 was a direct fit.
View attachment 534418

Tell me about that Radio you've got....

 

[JohnVill]

Tell me about that Radio you've got....

Yeah, it’s just a Linkswell T-Style radio but I programmed the start up and load up screen to the Laramie Longhorn Logo. If you any more questions I’d be happy to answer them.

Could you tell me everything I would need to get to try and get the cooled seats working?

 

[emjohn4]

I assume the same HSM is in the '13+ trucks as was the '09-'12 trucks....

I added pictures to my prior post. Basically, the outputs of the 4th gen HSM are ~+10vdc (low) and ~+12vdc (high).

Take those outputs to the input of a PWM controller.

On the 5th gen fans, cut the wire to the fan on the seat side. The red is +12vdc, the black is ground, and the white is the PWM control. Wire the +12vdc and ground to the same inputs as the PWM controller. The PWM output gets wired to the white wire on the fan motor.

That's it! When you turn on the cooled fans, the PWM controller and fan gets +12vdc. That's your high speed. When you push the button for the low speed, the fans will then get ~+10vdc.

 

[emjohn4]

I assume the same HSM is in the '13+ trucks as was the '09-'12 trucks....

I added pictures to my prior post. Basically, the outputs of the 4th gen HSM are ~+10vdc (low) and ~+12vdc (high).

Take those outputs to the input of a PWM controller.

On the 5th gen fans, cut the wire to the fan on the seat side. The red is +12vdc, the black is ground, and the white is the PWM control. Wire the +12vdc and ground to the same inputs as the PWM controller. The PWM output gets wired to the white wire on the fan motor.

That's it! When you turn on the cooled fans, the PWM controller and fan gets +12vdc. That's your high speed. When you push the button for the low speed, the fans will then get ~+10vdc.

This is the PWM controller I bought, FWIW. There are many on ebay that appear to be similar...but I can state this one works.

Signal Generator Module Adjustable PWM Pulse Frequency Duty Cycle Square Wave GL | eBay

LCD display frequency and duty cycle, very clear, PWM output can be set to the frequency and duty cycle;. PWM output, you can set the frequency, duty cycle;. *** (no decimal point): the smallest unit is 1Hz, the value range of 1Hz ~ 999Hz;.

www.ebay.com