Help please , we’re is the blower resister on my 2005 t5 s40, is it attached to the blower motor itself requiring the complete removal of the motor or is it located somewhere else other than the motor, got a lot of stuff removed except the motor which looks like a huge pain in the butt, was hoping I could get at it without the removal of motor, can’t find nothing on untuned or any other site, lots for other years but not mine, I would real appreciate some help on this or a diagram , just anything at this point….thank

 

Not sure, have not done that job - Vida shows the fan control module as being part of the climate module. If the fan (6/28) only has two wires going to it - the resister is part of the climate module. xemodex.com fixes those for fan problems.

 

The fan is controlled via a PWM signal from the CEM.

 

There is no blower motor resister then, I see a lot of videos on all Volvo makes on replacing the blower resisters but just can’t find one on my 2005, they sell them online to but was just trying to find out the location of the resister , I though someone may have done this job, oh well I’ll keep trying to get an answer as the resister controls the fan speed as well

 

Does your fan not work at all? If so you could have a problem with your CCM - (according to xemodex)

The resister or fan control module in the above wiring diagram is 4/31. Diagram below from the illustrations in the back of the wiring diagram book show 4/31 as the entire climate control panel. I don't think that's correct. (volvo diagrams have been inaccuate before) - Personally I think it's in the blower motor - for there are 4 wires going to the motor itself - and if it were part of the Climate control panel 4/31 would have a dashed line around it and the CCM indicating it was inside that component. EST6 is correct - the control signal (the 2 small wires on 4/31 other than power and ground) comes from the CEM not the CCM. It is true most/all other Volvos have a separate part like on a 99-07 svxc70/80, 08-15 vxc70, 240, 740, 940, 960, 850, svc70, and pictures of those appear when googled - but nothing for your car.

 

Right, there is no resistor. The CCM tells the CEM what fan speed is commanded and the CEM controls the fan.

 

Thanks for the information as that would explain the $465 part, I was also mislead by parts geek and rock auto and others that do sell blower resisters for 2005 s40 as a separate part why i thought it was part of the blower motor, just had to screw back off and attach the resister in, that definitely had me confused looking for it, wow spent hours taking glove box all trim and peeling carpet back ahhhhh just to find out it’s part was right in front off me, well off the the wreckers first I guess in hopes of finding a good one as that part is kinda dear,,,,,

 

The fan would stay on even when key is pulled out, have to pull breaker to stop it, just blows on high speed, looked it up and everything said blower resistor, and that’s why I started this long annoying labour intense procedure to only find out it was for nothing, it was right in front of me, I hope this new expensive part works.ahhhhh need another beer

 

(volvo diagrams have been inaccurate before)

Yes - examining a later year model - the newer diagram is correct. Wiring diagram shows 4/31 as being part of 6/28 the fan. And the pictures in the back are correct also. Hopefully your fan motor/resister is the actual problem - for the CEM and the CCM both have failures that will prevent the fan from working. (according to xemodex)

 

Well now that I have this information, thinking previously the fan didn’t have the resister on the motor and was controlled by the CEM, I put the car back together and now I will have to take it all apart again ahhhh oh well, looks like hours of work all over again and fight to get that motor out from behind the dash in such a small place , I have scrapes and bruises from trying b4, it’s a huge pain to do, you even have to remove the seats also so you can get on yore back to get ur arms in there , I should say arm as that’s all that fits in there ,,,,,,thank you everybody on all the help on this matter, even repair shops and suppliers couldn’t give me an answer but this site did

 

Before you replace the motor you might want to make sure the resister is bad. You can talk to the CEM and CCM with a compatible scan tool to make sure either of those control units is not sending an erroneous signal to the fan to turn on when it's not supposed to. I would think it would be very frustrating to spend at least 5 hours replacing a fan motor if that did not solve the problem. Volvo warranty time flat rate for that job is 4.5 hours -

 

When you say a compatible Scan tool, I only have the obd 11 scan tool I don’t know what that would do but are u talking about a specific Volvo scan tool or a basic one you can buy at local auto store or is it an expensive high tech one….sounds like something I need ……you’re right though as I would rather change out the cem rather than the motor for sure….thanks

 

You need a scan tool that can talk to all the control units, not just basic obd stuff. Basic OBD usually justs talks to Trans and engine control units for emission related codes.
For instance with Vida you can monitor the requested fan speed in the CCM. You might be able to activate the fan with a scan tool also - the option is greyed out for I'm not actually connected to a 2005 s40

 

Vida, I always see that mentioned, is that software you purchase to run on a laptop…..I’m back to that scan tool you talk about, we’re do you get one and does it plug into the same place you hook the obd tool to also. Sorry but I’m new to this vida or scan tool and also interested in it, just wanting maybe a little info on it to steer me in the right direction,,,, thanks

 

Vida is the the factory diagnostic, parts, repair, wiring diagram software. Available in DVD form that you loaded onto your CPU and updated 4 times a year until 2014. It was a subscription based service and the latest (2014d) can talk to 2015 years model cars. Now it is an online subscription service, a small client is loaded on your pc and all the brains/knowledge is somewhere else. Purchase at volvotechinfo.com

Someone stole and hacked VIDA 2014 (and earlier) to run without a subscription. It is easily found free on the internet. Some sell it preloaded on a flash drive - Swedespeed used to have a link for a download - I imagine Volvo had them remove it. You will need a Dice unit to connect between the Obd port and your CPU to be able to talk to your car. If you are going that route - find and install VIDA first - there is a learning curve. It was designed to run on a win7 pro machine with a minimum of 3gb ram - others have been successful running it on other platforms (virtual, etc) You might find the information you seek here - look at the post that's had 2000 answers and 598k views. or google volvodiag
https://www.swedespeed.com/forums/ob...anagement.121/

 

Well, after toiling at this problem decided to go the route of the blower motor which the resister is attached to it, saw a great utube video on the 2005 s40 blower motor blower replacement without using that special tool, was easy to follow but a lot of labour involved along with cuts and bruises and curse words but got it in and works perfect again, $55 at the wreckers as an OEM one was outrages, great site , glad I joined, thanks to all who helped

 

Congratulations on the successful repair. The fan controller unit (internal to the fan) would have been my first guess (with most fans, if they're on all the time, it's a relay or module in the car gone bad).

 

 

they sell them online to but was just trying to find out the location of the resister , I though someone may have done this job, oh well I’ll keep trying to get an answer as the resister controls the fan speed as well

 

Register is attached to fan . Its a whole Unit just change that. Its under Dashboard . I did it my self , there are three screw only. 004591774866 is my mobile no, whats app if u cant figure it out. Good luck