e38 pwm cooling fan control
e38 pwm cooling fan control Could anybody tell me how to operate my single fan, single speed, single relay cooling fan using the pwm (pulse width modulation) signal from my E38 ECM. Is it possible, or do I have to redesign my cooling system. I was told that the ECM supplied a ground so I wired the relay up for that. I now know that the ECM supplies a pwm signal, but don't know what to do with that. The tune allows me to adjust temps and % power (from 0 to 100). Thanks, Gary
Yes. We do it on the Trailblazer SSs all the time.
__________________
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
You have to buy the harness for the fan controller. Then you will need a 12124685 connector to plug into it, one cavity will be heavy gage wire to battery power, one to ground and one small ~20-gage wire to pcm.
__________________
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
Trending Topics
True but you wont have the functionality of the variable speed.
__________________
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
I can confirm what juced211s said. I've got an E38 that's operating two fans with PWM. It's so easy to make this work it's ridiculous. You just need the module and the correct connector.
All I did was wire the + and - from the module to both fans, so they'll both run whatever percentage is commanded by the PCM. I put a 60A fuse inline on the + into the module to protect the electronics. 60A should be more the two 11" Spals I'm running should ever draw combined, and with the nature of PWM being what it is, the current spike on initial turn on isn't a worry.
I've had the fans up to 100% using the bidirectional controls on my HPTuners Scanner without a hitch. It's pretty cool to play with, as you can hear the fans speed up and down with a mouse click. In day to day running, I've rarely even heard the fans, as they never really hit close 100% even when it's 110*.
All I did was wire the + and - from the module to both fans, so they'll both run whatever percentage is commanded by the PCM. I put a 60A fuse inline on the + into the module to protect the electronics. 60A should be more the two 11" Spals I'm running should ever draw combined, and with the nature of PWM being what it is, the current spike on initial turn on isn't a worry.
I've had the fans up to 100% using the bidirectional controls on my HPTuners Scanner without a hitch. It's pretty cool to play with, as you can hear the fans speed up and down with a mouse click. In day to day running, I've rarely even heard the fans, as they never really hit close 100% even when it's 110*.
Probably GMPARTSDIRECT.
__________________
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
I think it only comes with the fan.
__________________
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
I can confirm what juced211s said. I've got an E38 that's operating two fans with PWM. It's so easy to make this work it's ridiculous. You just need the module and the correct connector.
All I did was wire the + and - from the module to both fans, so they'll both run whatever percentage is commanded by the PCM. I put a 60A fuse inline on the + into the module to protect the electronics. 60A should be more the two 11" Spals I'm running should ever draw combined, and with the nature of PWM being what it is, the current spike on initial turn on isn't a worry.
I've had the fans up to 100% using the bidirectional controls on my HPTuners Scanner without a hitch. It's pretty cool to play with, as you can hear the fans speed up and down with a mouse click. In day to day running, I've rarely even heard the fans, as they never really hit close 100% even when it's 110*.
All I did was wire the + and - from the module to both fans, so they'll both run whatever percentage is commanded by the PCM. I put a 60A fuse inline on the + into the module to protect the electronics. 60A should be more the two 11" Spals I'm running should ever draw combined, and with the nature of PWM being what it is, the current spike on initial turn on isn't a worry.
I've had the fans up to 100% using the bidirectional controls on my HPTuners Scanner without a hitch. It's pretty cool to play with, as you can hear the fans speed up and down with a mouse click. In day to day running, I've rarely even heard the fans, as they never really hit close 100% even when it's 110*.
Fan control module would be from GM (if you are trying to use a PWM signal). Pin is X1 58 on E38.
Jon
PSI
Jon
PSI
__________________
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
On The Tree
Joined: Jul 2011
Posts: 186
Likes: 3
Has anyone sourced the module connector, aside from complete fan assemblies? Appears to be p/n 09-4401-94 but can't find it anywhere.
The Bosch module is used on other brands but yards refuse to sell the connector even when purchasing the module. From pictures the pins appear to be same orientation, unclear if the connectors interchange. Unknown if the PWM control scheme is the same for other makes.
The Bosch module is used on other brands but yards refuse to sell the connector even when purchasing the module. From pictures the pins appear to be same orientation, unclear if the connectors interchange. Unknown if the PWM control scheme is the same for other makes.
