is there a way to test the fan control module?

 

whats going on? if it starts running before the engine is warm enough then its broken. theyre cheap and common so you can swap it out to test. good to have a backup unit

 

iS 275$ cheap?? and it just dosnt run at all

 

dupe

 

yeah mine was $15 used. my original one is still working, i just wanted to prove to myself
search "19700 fan control" on ebay. Do not buy the shiny ones, buy the one that has "Calsonic Kansei"

https://www.ebay.com/sch/i.html?_fro...+fan&_osacat=0

from a tesla
https://www.ebay.com/itm/40418777350...Bk9SR8j64Lv1Yg

 

brand new but I wont be surprised if they send you the "shiny ones". avoid this
https://www.ebay.com/itm/19595181640...Bk9SR8r64Lv1Yg

 

After my rebuild my fan controller stopped working for no reason. Relay was good. Swapped it out for a used one but haven't even found out if it's needed to come on yet. This is a common fail point but sucks its so expensive for OE module.

 

shouldnt the fan turn on with AC?

 

thank you so much man can you tell me why not to get the new shiny ones? just wondering about that

 

Yes but it dont turn on at all with the ac after 30 min it never turns on...

 

People here already tried it and got around 1 year (IIRC) before it died again. I think theyre repackaged by Gates and other parts store suppliers

 

with a scope- this is very easy to test. It amazes me that most of you are genuinely talented "car guys" but no one here is using a scope.

to me- not having a scope, is like being a mechanic but owning no wrenches....

It gets a square wave pulse-width control to the base of a transistor. From there, it modules the fan output. This is how nearly all of the automotive fan controllers worked during the time the car was built.

 

I don't have a scope and I was thinking about getting the evoscan wire but there are 3 of them and I don't know witch one is best

 

openport 2.0 is the best. Evoscan can test the high and low speed function of the fan controller. Usually they fail closed, as in the fan wont shut off. If it wont come on at all, check the fuse, relay, wiring harness for issues as well.

 

ok. just fyi the fan should turn on immediately. airflow is required for the AC to work efficiently