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The power distribution panel on your car is located under the hood in the engine compartment. It is located on the right passenger side closest to the firewall.
When you open the cover to the PDP, you'll see a series of blade type fuses in the front compartment and a bunch of wire harnesses in the back- that's where you'll find the tan colored relay you need to replace.
I have attached a youtube video for you to watch because it appears that the most common cause of this relay failure is due to water build up in the PDP compartment which is causing serious wiring deterioration and rusting- not only to the wiper relay but to the other relay components in that block.
So should you be experiencing the same problem when you open the power distribution panel, you'll know what to do.
Go to the front power distribution box and check 30A fuse 20 (GRN/BRN wire) which feed power to the blower relay. When the ignition switch is in START or RUN position, the relay closes and power is fed to the final stage unit. Depending upon the state of the automatic climate control module, power output from the final stage module is applied to the blower motor. If checking all this does not solve the problem, you may have a clogged heater core
the blower motor resister is located in the center of the dash board right above the radio,you have to remove the top part of the dash board to get to it. Its not that hard. about a 35minute job if u have some car knowledge. you can go to bimmer forum and there u will find pics and instructions on how to do this job. good luck
Is the lid to your fuse box missing?
The AC fuses are 16, 23, 31, 39. The heater blower is fuse 20. It is hard to describe which fuses those are if you don't have the diagram that is molded in the underside of the fuse box lid, but 20 is the last fuse on the right in the second row.
On a '97, if your climate control computer has not failed yet, you are on borrowed time. The fix is easy and cheap. Google "Frontiernet Farm Boy Home" for detailed instructions on my web page.
if its not blowing then the heater motor is not coming on . first check the fuse then check for power at the blower motor if no power to the motor replace the blower motor resistor located on the same heater box as the blower motor