Radiator fans not working

10

Asked by Jun 21, 2017 at 07:01 PM about the 2000 Buick LeSabre Limited Sedan FWD

Question type: Maintenance & Repair

6 Answers

10

Ok gang...having a problem here. 2000 buick lesabre limited. 3800 series motor. Radiator fans aren't working. Relays and fuses have been changed, along with the 190° thermostat and temperature control sensor directly below thermostat......dont Know Where to go from here....seriously stumped. Just replaced the dual fan unit and tested the old unit. One fan was bad.....anyone have any ideas?

1 people found this helpful.
32,465

YOUR SAYING THE IS POWER TO BOTH FANS???CORRECT?

32,465

IS IT GOING TO A GROUND VIA THE TEN/FAN SENSORS?

81,335

Unplug the coolant temperature sensor located just below the thermostat and start the engine. The check engine or service engine soon light will be on because the sensor is unplugged. Ignore it. Both fans should immediately come on and be running at high speed. If so, that basically rules out everything except for the coolant temperature sensor. You have 3 fan relays in the underhood fuse box. Two are 4 pin and one is a 5 pin relay. The 4 pin relays are for each fan individually. The 5 pin (high speed) relay is for both fans together. If all these components are good you'll need to check the PCM by using a scan tool to command the fans on manually for testing purposes. If the PCM doesn't recognize the commands it's faulty. HTH. -Jim

2 people found this helpful.
2,600

If you do not have a schematic, here is one for a Reatta and it should be similar....

2,600

Sorry....schematic above is not what I intended to post...this is better

1 people found this helpful.

Your Answer:

LeSabre

Looking for a Used LeSabre in your area?

CarGurus has 3 nationwide LeSabre listings and the tools to find you a great deal.

Postal Code:

Buick LeSabre Experts

  • #1
    Tom Demyan
    Reputation
    2,560
  • #2
    John Saffrahn
    Reputation
    2,250
  • #3
    Austin Gaboda
    Reputation
    1,510
View All

Related Models For Sale

Used Buick Regal
3 Great Deals out of 137 listings starting at $6,988
Used Chevrolet Impala
21 Great Deals out of 879 listings starting at $2,894
Used Buick Century
11 listings
Used Honda Accord
34 Great Deals out of 1,650 listings starting at $3,490
Used Toyota Camry
27 Great Deals out of 2,106 listings starting at $2,450
Used Ford F-150
133 Great Deals out of 11,522 listings starting at $3,900
Used Ford Taurus
15 Great Deals out of 368 listings starting at $3,900
Used Cadillac DeVille
13 listings

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.