Question about 1990 Buick Century

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1990 buick century

My heater and ac fan only work on high i'm told it's the blower relays where are they located

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They are located behind the right front headlights (passenger side). There is a bank of four relays mounted on a common holder. The four are for various purposes, one of which is to control the ac fan on the low settings. I got a bank of four used relays from and olds off of ebay. I plugged in the part number off the one I had into the search box to find it.

If a relay is bad, it will usually rattle.

Good luck!

Posted on Nov 06, 2008

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