2005 Grand Prix coolant fans not working

Asked by Guru9L1CM5 Sep 01, 2021 at 09:45 PM about the 2005 Pontiac Grand Prix Base

Question type: Maintenance & Repair

2005 Grand Prix base 100,500 mile The a/c
does not turn on the fans. The temp gauge on
the dash is correct well seems to be in
correlation with a the reading from a infrared
thermometer, the relays are good(swapped
with others) also jumped all 3 relays
separately and each time the corresponding
fan worked accordingly. I have hardwired 12v
to both fans have got them both to turn on.  I
replaced the radiator and hoses, thermostat
and housing, coolant temp sensor. Water
pump and serpentine belt.


Still in stop and go traffic it without air it willl
eventually overheat, regardless if heat or ac is
on.the system is bled of air and filled with
correct coolant.

Is it possible I bought I bad ect sensor from
the store and it only is sending to the gauge
and not to the relays considering I can jumpe
them to come on?

3 Answers

Guru9L1RF7 answered 2 years ago

You need to find the wire that provides voltage when the a/c is turned on. Your probably going to have to get a wiring diagram.

Mark helpful
18,255

munron answered 2 years ago

It is unlikely, but possible that you got a defective sensor. It would certainly have been cheaper to rule that out first rather than replacing your entire cooling system in hope of somehow fixing an electrical problem. I agree, a wiring diagram might guide you. A few dollars spent at a shop that specializes in auto electrical repairs would probably be money well spent at this point, especially if you want it fixed sooner rather than later.

Mark helpful

Your Answer:

Related Questions

  • 2005 Grand Prix coolant fans not working 3 Answers

    2005 Grand Prix base 100,500 mile The a/c does not turn on the fans. The temp gauge on the dash is correct well seems to be in correlation with a the reading from a infrared thermometer, the relay...

    2005 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • Fans not working on my 1995 grand prix SE 3.4L 4 Answers

    I have a 1995 grand prix se and the fans don't come on at all and the while idle, the temp hand goes redlined and while driving it almost redlines and then comes back down. What should I do.

    1995 Pontiac Grand Prix 2 Dr SE Coupe

    -

    Maintenance & Repair

  • gauges not working 2005 grand prix 1 Answer

    started car and gauges and signal lights not working

    2005 Pontiac Grand Prix GT

    -

    Maintenance & Repair

  • 2005 Grand Prix: High beams not working 6 Answers

    Hi, I have a 2005 Pontiac Grand Prix I just got. My brights don't work. When I flip the brights switch, the blue light on the cluster comes on, but my brights don't. The low beams don't turn off or ...

    2005 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • 2005 Pontiac Grand Prix coolant leak. 2 Answers

    While engine is idling the temperature runs high. As long as the vehicle is in motion the temperature is fine. Heard a hissing sound once I turned the engine off and later found coolant leaking ...

    2005 Pontiac Grand Prix GT

    -

    Maintenance & Repair

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2 nationwide Grand Prix listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Pontiac Grand Prix Questions

CarGurus Experts

  • #1
    munron
    Reputation
    8,140
  • #2
    james sparrow
    Reputation
    7,480
  • #3
    Dorian Hendricks
    Reputation
    6,010
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Pontiac Bonneville
1 listing
Used Chevrolet Impala
8 Great Deals out of 131 listings starting at $3,495
Used Pontiac GTO
4 listings
Used Pontiac Grand Am
2 listings
Used Chevrolet Corvette
23 Great Deals out of 767 listings starting at $18,999
Used Dodge Charger
41 Great Deals out of 852 listings starting at $4,888
Used Chevrolet Monte Carlo
6 listings starting at $9,800
Used Pontiac G6
16 listings starting at $3,995
Used Ford Mustang
35 Great Deals out of 1,585 listings starting at $5,977
Used Chrysler 300
25 Great Deals out of 518 listings starting at $6,995
Used Buick Regal
5 Great Deals out of 22 listings starting at $6,995
Used Buick Lucerne
10 listings starting at $5,950

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. Content will be removed if CarGurus becomes aware that it violates our policies.