I fixed my high speed fan today. Symptoms were: all fan speeds worked, except high speed, which worked sometimes and would shut off randomly (back to a very low speed).
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I figured the failing relay was number 1 (Cooling fan), but in fact the relay that is bad causing this symptom is #2 (heater). They are the same relay type. The bad relay had a dark pin (heat?) on the red side. Once a new relay was placed on relay 2, high speed fan works 100% of the time.
All the relays in the area existed surface rust, so perhaps someone got snow/rain/drink back her at some point. The other accessories seem to be working fine, so I'll leave those be. Given how common these 4 pin 12V 22A relays are in the car, it probably wouldn't be a bad idea to have a few spares available. PN 90987-02004-83.
OH I also smashed a brittle old door retainer clip on the way back in. I replaced it with a new yellow clip thing PN 67771-30090
Hoping to get this new starter motor in this weekend. Tired of waiting for the car to cool down so I can start when running errands!