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Posted on Aug 06, 2009
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Where exactly is the blower motor resistor for a 1997 E36 BMW located? The car has climate control. Is there a website or a place with photos specific to this vehicle??

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johnz1313

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  • Expert 88 Answers
  • Posted on Aug 07, 2009
johnz1313
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Hi, hope the folowwing will help i found on internet if not email me at [email protected]. My service manual say its in the upper leftside of the heaterbox. remove lower left dash trim panel (drivers) and pull out resistor pack.

Fixing BMW E36 Blower Fan Speed . . . DIY!
It has been two weeks since my blower fan stopped working correctly on the low speed options (1, 2 and 3 ). It only works on high speed (Option 4). At first, I thought that the problem was in the fan speed switch because I’ve seen this problem before and when I told my electrician about it, he disassembled the switch and tried to clean it. Of course this solution didn’t work. So, I’ve decided to dig for the solution myself and I found that this is a pretty common problem among E36 cars. The problem is that speed 1, 2 and 3 are controlled by something called (Final Stage Unit on digital climate control units, Blower Resistor Pack on analog climate control units). The 4th speed is actually uncontrolled, so, it simply bypasses the final stage or resistor pack units. That explains why the fan works on the 4th speed and not the other lower speed options. Anyway, I tried to find a DIY (Do It Yourself) procedure on how to fix this problem and I found one that was written by "Deem3" on bimmerforums (thank you Deem3 for the great write-up). Now take a look below. It’s a really simple procedure. I will be trying it this weekend to see how it goes. I will post more details about this job soon. Symptoms (2 cases):
- Digital Climate Control: All the lights on your digital climate control are working and the buttons respond but the blower doesn’t blow any air.
- Analog Climate Control: The blower doesn’t work except on the highest speed (4th position).To replace it, we need to take off the driver’s side knee bolster. This only requires you to remove two screws,one on the right side of the bolster and one on the left. Using the phillips screwdriver remove the following screws. Now remove the speaker and footwell light. Using the 10mm socket remove the 3 bolts holding the metal shield. And using the phillips screwdriver remove the obd2 port. Now you should be able to see the footwell air duct. Remove it by pulling it.
With everything out of the way you should now be able to see the defective final stage unit. Remove it using the torx-20 screw driver. Replace it with the new part and before you put everything back turn on your car and test the blower. If everything is ok proceed to put everything back, and enjoy the benefits of having a blower in your car again.
.

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Can't locate the blower motor resistor

Here's a link to what your blower motor resistor look's like,it's next to the blower motor,2 screws hold it on.Blower Motor location can change from year to year. It can change with the trim level of the vehicle. A vehicle that has front and rear climate controls may be configured differently than a vehicle that has front controls only. The following are two different repair procedures. One is given because the blower motor is located and accessed in the engine compartment, the other is given because the blower motor is mounted inside the vehicle. http://www.autozone.com/cooling-heating-and-climate-control/blower-motor-resistor/duralast-blower-motor-resistor/cadillac/deville/1990/8-cylinders-3-4-5l-fi/860043_0_0 Here's a link to your blower motor. GET 35 GIFT CARD FOR EVERY 100 SPENT ON ONLINE SHIP TO HOME ORDERS
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I found this wiring schematic at: http://www.f150online.com/forums/articles-how-tos/385953-replace-04-08-fan-blower-motor-resistor-emtc-hvac-3.html
It looks like it is located under the dash on the passenger side, and appears to be pretty close to the blower motor. The resistor or controller is different if you have a climate control system vs. a manual temperature control.
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ProTip: Your car is known as an "E36" body style. If you're Googling problems and you want to get to high-quality answers from people who own the same car and have probably dealt with your same problem, search for your symptom using the term "E36".

The classic symptom of a blower resistor failure is that the fan works on the highest speed, but not on some or all lower speeds. This is because the blower resistor is bypassed on the highest speed. You say your fan is intermittent on the highest speed, so it's unlikely to be the blower resistor.

If you have a "display" on your climate control (versus three large rotary knobs and no display), then your car also has something called a "Final Stage Unit" which is an electronic part that the system uses to change the motor speed. You may not even have a blower resistor in this case.

It is possible that the motor itself is bad, but generally these motors fail by becoming noisy, or they sieze up, or die altogether. They don't typically start and stop randomly. However, you can test this by connecting a test light or voltmeter to the motor when the problem is occurring. If there's 12vdc there but the motor isn't running, then your motor is bad. If there is no power there when there should be (i.e. fan is turned on), then the problem is elsewhere.

Or you can take a gamble and replace the final stage unit. Google "E36 Final Stage Unit" and you will find step by step procedures.
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From what your saying, it works in a sense, but very little air is blowing out. I had this issue with my '96 328i where the climate control was only running the fans at a low speed no matter what setting I put it on. The resolution to my problem was replacing the final stage unit for the climate control and now my heat and a/c work beautifully and the fan goes from low to high without problems. If you don't have climate control but the manual dials for the heat and a/c, then you may need to change the blower resistor pack. For either unit, it can be located in several places and you'll have to do some searching to find it good. If the convertible is any similar to the 4dr sedan I have, it should be located under the dash panel on the drivers side at the rear of the console. Hopefully this link may help you out.

http://forums.bimmerforums.com/forum/showthread.php?t=292522


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