Originally Posted by Pop N Wood

Yeah I bought one to use for that purpose. Hooked it up to a homemade pulse generator and it ran my fuel pump just fine. The unit has no internal ramp up or down, it will immediately run the pump at whatever the input PWM duty cycle is.

Originally Posted by scotte

ok so i figured out how to have pwm fans without the expensive corvette controller with the impossible to find plug

*****disclaimer ******

this works for me it may or may not work for you
most cooling fans can pull a good amount of current
(enough to start a fire if something goes wrong )
make sure the module/relay can support your fan and please insure everything is wired correctly and fused properly
I'm not responsible for what you do to your vehicle/self/grandmother's garage

*****end disclaimer*****

ok so i have been experimenting with various cooling fan control setups for the jeep i'm building (03 wrangler stretched 15" with a 09 4.8/gt45/e85/4l80e/circle d billet converter)

the 09 4.8 runs on a 09 e38 ecm/t42 tcm (with a van calibration)

i wanted my cooling fans to be pwm but i didn't want to spend the money on the corvette module / plug

i have successfully used a 05 caravan/town & country fan controller (04-06 chrysler mini vans used pwm to control the fans from 30% to 100%

the controller is simple and widely available cheap (they even give you a plug most of the time )

although i recommend getting one directly from the chrysler dealer (for reliability) i don't think they come with a plug

i grabbed mine from a local salvage yard as i was unwilling to wait

here is the link for the dorman one on amazon
http://www.amazon.com/Dorman-902-310.../dp/B0053T60SE

$29.61 with free 2 day shipping (if you are a prime member)

the factory wire colors are as follows

orange/red fused 12v+ (had a 40amp fuse from the factory)

dark blue/dark green output to fan (12v+)

dark blue/violet control wire (goes to x1 pin 58 on a e38 ecm

black/dark green ground

for mounting the module has one locating peg and a hole for a hold down bolt
(i drilled a 5/16 hole for the peg and used a self tapping bolt to secure mine to the fender

the efan i'm using on my jeep is from a 02 ford escort which uses a 40a fuse also

after setting up my tune (via efilive) by turning the fan option to pwm electric and setting of the % table (i was careful not set a % lower than 30% as according to the chrysler service manual that is as low as the minivan ecm goes) and i didn't want the burnup the module by making it work outside of its design limits

i was disappointed after initially running the fan test via a tech 2 (scanning as an 09 corvette) as the fan was kicking on and off repeatedly (starting slow and going faster) but that must be how the test is performed as when the engine was warmed up the fans kicked on right as they should and slowly increased in % as the ect went up

i consider it experimental but i'm gonna be driving this thing shortly and so far it has just worked like it is supposed to

so there a gen 4 pwm fan controller for under $30 including the connector

if anybody wants to donate to my alcohol fund so i can drink to forget the 85 pages of service manuals,wiring schematics,and pwm operation technical crap i've read recently then my paypal is scott (dot) elenbaas (at) gmail (dot) com

enjoy your pwm cooling fans!

Originally Posted by Malejyetti

Hi,

would you help me please, how to connect the E67 (CTS-V) ecu to control the PWM bodule fan Bosch 1137328118, please.

It would be really helpfull. I probably don't fully understand what is needed to connect.

Many thanks

Petr

Originally Posted by Project GatTagO

Originally Posted by Project GatTagO

Post your question over there. You'll get help

Originally Posted by 79LS1FOX

I know this is an old thread, but I would like to try the Chrysler PWM fan module on my car. Heres what I have currently E38 ECU with the F-body dual fan setup, so what I was wondering was if I could use relay #3 which doesn't have battery power on term 30 but when the ECU triggers that relay it closes the contacts and sends term 87 to ground could I use that to trigger the Chrysler PWM, I'll remove the current wiring harness to the fans and build a new one using the Chrysler PWM. I know it would be easier to re-pin the X1 connector but my harness was built by BP automotive and I would prefer to keep it in case I want to switch back.
Heres a picture of the way it's set up for the F-body fans. Thanks for the feed back...
https://ls1tech.com/forums/conversio...e-i-m-5-a.html

Originally Posted by 79LS1FOX

Thanks Andrew, so what changes pin 58 on the ECU from sending a ground to sending a PWM-signal, because if you look at post 1 he says the control wire goes to X1 pin 58 which is what I'm using to ground the relay. What pin did you use to send the PWM signal on your Cougar set-up.

Originally Posted by TurboTim

Just so everyone isnt confused. Someone listed the 4 wires and the ground and signal wire are actually switched. Last pin is ground. 3rd pin is signal.

Originally Posted by TurboTim

Just so everyone isnt confused. Someone listed the 4 wires and the ground and signal wire are actually switched. Last pin is ground. 3rd pin is signal.

Originally Posted by G Atsma

Get another unit and wire it correctly. It should be fine.

Originally Posted by 2Stimpy

Ar you formiliar with the gen 5 ecu? Do I need ac pressure for the fan to work correct?