PWM cooling fan(s) control using ECM

[samckitt]

Originally Posted by Old66Tiger

Thanks. What year and models does this fall into? Or is this pretty much the same across multiple models?

I can't say 100%, but I pulled mine off of early 2000 front wheel drive cars. I pulled a few for friends & they all worked. I bought the connector from EFI Connection & it was the same connector as what I found in the junkyard. I assumed/hoped that it was the same sensor. I think I paid $5 a piece for the connector pigtail, sensor, & segment of hose.



I haven't done it on my AC line yet, but buddy took one of these to AC shop & they removed the fitting from the tube & then braised to an elbow that then gets crimped onto a hose.

[andrewb70]

This looks about right:

http://www.rockauto.com/catalog/more...nid=516&jpid=0

Andrew

[samckitt]

EFI Connection has the AC sensor pigtail & parts:

Pigtail:
https://www.eficonnection.com/eficon...spx?ItemId=910

Connector parts:
https://www.eficonnection.com/eficon...spx?ItemId=207

And sensor:
https://www.eficonnection.com/eficon...px?ItemId=1080

Sensor through them is $60, pigtail is $11.50.


Info on the page for the sensor states:
" We currently do not know where to source a fitting."

That's why I headed to the junk yard. I think I paid around $5 a piece for the fitting, sensor & pigtail.

[Obsin71Ls1]

You don't need to go to the junkyard to get the fitting for the A/C pressure switch; it is available from several vendors either in aluminum or steel. I don't know if I can post non-sponsor links here but if so, let me know and I'll provide the links. Also, as far as I know, GM A/C pressure sensor used in most LS cars has a fine metric thread. Specifically M10 x 1.25.

The fitting is on the right.

[samckitt]

That doesn't look like the threads on fittings for the sensors I have. The ones I have are a finer thread I believe. I will try to find one in my shed (moved & stuff is everywhere), and take a pic of it.

[dontlifttoshift]

So I just came across this gem on a bmw forum.



Of particular note are sensors number MT1297 and MT1339. They use the same connector and have nearly the same voltage readings but one is female 3/8-24.....same as a female Vintage Air trinary switch. VA has adapters to install that into a drier or inline fitting if you want.

MT1297 transfers to a GM 22599559 or ACDelco 15-72104 and it seems to have the same pressure/voltage ramp as the one parsons outlined about 4 pages back.


****Edit**** ACdelco 15-72104 does not fit the Vintage Air adapters. Thread and pitch are wrong so that is out.....back to the previous plan.

[Old66Tiger]

That's cool. I sent an email VA asking about an adapter and no response. The only fitting I see that would work is a Schrader style but not sure if that is what you are referring to.

[will69camaro]

Originally Posted by samckitt

I can't say 100%, but I pulled mine off of early 2000 front wheel drive cars. I pulled a few for friends & they all worked. I bought the connector from EFI Connection & it was the same connector as what I found in the junkyard. I assumed/hoped that it was the same sensor. I think I paid $5 a piece for the connector pigtail, sensor, & segment of hose.



I haven't done it on my AC line yet, but buddy took one of these to AC shop & they removed the fitting from the tube & then braised to an elbow that then gets crimped onto a hose.

For what it's worth, a Vendor sells something that would make this slightly easier possibly.

http://www.restomodair.com/shopproducts/t-fitting/

I think that's the route I'll be going.