Fans don't work

Asked by May 21, 2017 at 11:59 PM about the 1990 Buick Regal

Question type: Maintenance & Repair

Where is temp swich
on90 Buick regal 3.1

1 Answer

2,480

The ECM controls the fans, if you are lucky it could be as simple as a relay. I would start by checking both fans...at the plug jump 12v and verify that the fans work. Then find the relay box (probably under the hood) and there should be a layout of the relays on the underside of the cover. By switching relays, you can find the bad one....... I am attaching the fan schematic from 1990 Reatta/Riviera and yours should be similar. The ECM turns on different relays starting with the one on the engine side of the radiator, then when you turn on the A/C the one in front of the radiator turns on...at this time both are running at 1/2 speed...if the water temp goes over the preset (about 230), both fans go to full speed until the coolant temp drops.

Your Answer:

Buick Regal Experts

  • #1
    Js08016
    Reputation
    440
  • #2
    dvigano
    Reputation
    430
  • #2
    Tom Demyan
    Reputation
    430
View All

Related Models For Sale

Used Honda Accord
35 Great Deals out of 1,625 listings starting at $1,800
Used Chevrolet Camaro
6 Great Deals out of 999 listings starting at $4,500
Used Ford Mustang
21 Great Deals out of 1,216 listings starting at $5,995
Used Toyota Camry
26 Great Deals out of 2,105 listings starting at $2,995
Used Nissan Maxima
6 Great Deals out of 361 listings starting at $4,490

Used Cars For Sale

2017 Buick Regal For Sale
63 listings starting at $21,800
2016 Buick Regal For Sale
22 listings starting at $17,750
2015 Buick Regal For Sale
17 listings starting at $13,933
2014 Buick Regal For Sale
3 listings starting at $16,495
2013 Buick Regal For Sale
5 listings starting at $16,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.