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1989 Mercury Sable - needs blower motor controller

I have a 1989 Mercury Sable 3.8 L my blower motor controller well I only blow on high I can’t find this part anywhere would it possible to switch to manual and just bypass the eatc you

If only the lower blower speeds don’t work, then you probably need one of these.

https://www.rockauto.com/en/catalog/mercury,1989,sable,3.0l+182cid+v6,1203556,heat+&+air+conditioning,blower+motor+control+module+/+resistor,6557

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