Question about Cars & Trucks

1 Answer

1997 Buick Skylark radiator fan weak, works sporadically

The radiator cooling fan works sporadically, sometimes it turns on but turns very slowly/weak, other times not at all. If I 'jumps tart' the fan by pushing it with my finger it starts turning, but slows down and stops. While it is turning, the air strength is very weak. At a stop light the A/C gets warm too. Is the fan's strength and speed controlled by the temperature sensor? As a test, I unplugged it and used a 12V motorcycle battery to test it and it turned very strongly and fast.

Posted by Anonymous on

  • 5 more comments 
  • Dave Takeshi Jul 12, 2013

    Hello everyone,

  • Dave Takeshi Jul 12, 2013

    Hello everyone,

  • Dave Takeshi Jul 12, 2013

    Hello everyone. Thank you for your solutions so far. This is my first time asking any questions so please do not worry about getting a bad rating as I believe that what is important is all of you who took time out of your busy lives to try and help me. I appreciate it a lot, even though some of the solutions do not work. Sorry about the first 2 comments above, I pressed 'enter' to make a space and it posted my greeting before I wrote the rest of my comment. Ronny, the radiator reservoir is full. I first drained the whole system as much as I could. The radiator fluid is clean and was changed not too long ago. I've always used Dexcool so there is no corrosion or plugged passages as far as I can tell. The fluid level is not the problem. The problem is the cooling fan. It works fine sometimes, and at other times it turns so slowly that I can't feel any air blowing out the back of it. Ealier in the night I started the car and let it idle until the engine temp needle was in the middle of the gauge in the normal zone. Every few minutes the fan would kick on and it seemed to be working okay as the noise from it was much louder than last night, and it was moving a lot of air out the back, as much as when I powered it using the 12V motorcycle battery yesterday. I then drove it around on roads at 25-30 mph with the A/C on, then jumped on the freeway for a bit. I then parked it with the engine still on at a park and soon the temperature climbed a little higher than normal. The air coming out from the A/C ducts got warmer, so I knew the fan wasn't turning again. I checked it and sure enough, it was barely turning. I could stop it easily with my fingers, and when I let it go it started spinning again, but very slowly. There is only 1 large fan on this model which cools both the radiator and the A/C condenser. It has an isolated negative and is not body grounded. I tried looking for the relay in the fuse box, but could not find one. I found only a fuse for the A/C fan. Can anyone help me find the location of the temperature sensor for this year make and model car so I can test it with an Ohm meter? Also, does the system just turn the fan on and off, or does some part of the system also control fan speed? If anyone can help me with those things I'd appreciate it very much. Thank you all so far for all of your help.

  • Dave Takeshi Jul 13, 2013

    July 13, 2013 2.29am Okay, I have identified the cooling sensor. It is located next to the waterneck on the right side of the block. I also identified the relay. It's on the left side (front of car facing engine) near the firewall. There are 3 other relays on that bracket and the fan relay is #3 (left to right). It shares the same light blue wire (positive) that the plug to the fan has. I jumped it at the relay and the fan took off and blew full blast, which is a good thing. It means that the fan motor isn't the problem. But here is where it gets just too weird. When I hooked everything back up, I took it for a drive to get it up to its nomal operating temperature and parked it with the motor and A/C still on. As the temp rose, the fan kicked on and spun very slowy. I'd say 100 rpm if that. I could easily see it turning to the point I could count the revolutions. I used a piece of rubber and tried to stop it, and it gained power and rpm's. The harder I tried to stop it, the faster it turned. When I let it run on its own, it slowed and almost stopped again. So I touched it again with the rubber piece and it sped up, blasting air out the back very strongly. This might indicate that the problem is something like a termistor or a load sensor that I am not familiar with. Is anyone familiar with this kind of system. As this is probably one for the experts, if you don't really understand what I just wrote, please do not reply for the sake of replying. I do appreciate the sentiment, but I do need to get this fixed for my mom and want to keep the cost down. Times are hard all around. Thanks again everyone.

  • Dave Takeshi Jul 21, 2013

    Hello everyone,

  • Dave Takeshi Jul 21, 2013

    Hello everyone,

  • Dave Takeshi Jul 22, 2013

    Hello everyone, Okay, I located and put in a new temperature sensor. I thought it had fixed the problem as the fan blew hard when the motor was on. The fan would come on 15 seconds after the car was started and blow strongly. However, yesterday I drove it and while at a red light I noticed the temperature raise slightly, then more and the A/C air got warm again so I turned the engine off for the duration of the light and started back up when it changed to green. I was next to a freeway onramp and went on the freeway which cooled the engine down from the fast moving air. When I jumped off the freeway, it got hot again. Strangely, I tried the old 'turn the heater on' to try and help cool the engine temperature, but it did not work. The air coming out of the vents were cool. It could be a plugged heater hose problem though, and it did not help to cool the temperature. Once home, I let the engine idle and popped the hood. Sure enough, the fan was once again turning slowly. Putting resistence on the fan with the soft rubber piece again made it speed up. The more resistence, the faster it spun. Is there some kind of load sensing sensor in this system? I just checked online for any similar problems in the Buick technical service bulletins but found nothing pertaining to this problem. I also noticed that one parts company offered an auxiliary fan control unit. Where would the fan control unit on this model be located? I don't think it's the relay, as it's just a small switch turning on a big switch..

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Cars & Trucks Master
  • 1,702 Answers

Hi, I believe it could be a bad temp sensor. Which turns the fan on or off. Have it checked. Replace it with new one. Hope that helps you.

Posted on May 25, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 87 Answers

SOURCE: 1994 Hyundai Excel Air conditioning RADIATOR´S FAN works always very fast

this not really a problem as the fan speed is controlled by the high preasure switch in the ac system the hotter it is outside the higher the preassure will be in the system as hot as its been the preasure is high already when the compressor cycles it pulls suction on one side and outputs high preasure on the other the fans cool the condenser the higher the ambient temp the faster they go so all is fine...

Posted on Jun 09, 2008

  • 8 Answers

SOURCE: 1990 jeep cherokee 6cyl inline- electric radiator fan inop.

the aux fan only works when the ac is on, and has come to a predetermined temp(?) i found this out while going up a long grade in the back country without the ac on and later found out the radiator was half plugged!

Posted on Nov 22, 2008

  • 599 Answers

SOURCE: 2003 Silverado ac/heat blower does not work

yes make sure all the wires are off the blower motor and jump it to give it 12 volts if the blower works the problem is else ware. get back to me if you need more help,please don't leave bad rating get back to me and we'll go from there

Posted on May 15, 2009

roniecon
  • 6826 Answers

SOURCE: cooling system purge info

The biggist problem is most likely the cooling system needs bleeding to purge the air out of the cooling system.To do this,the easy way,is to start this with the car cold.Remove the reservoir cap and fill it full,past the full mark.Wait to see if the coolant level drops.Then refill to the top.Replace the cap,and start the engine,and let it run up to about 218 to 220,and shut the engine off(do not turn ac on,make sure it is off).Wait about 45 minutes,and look at the reservoir level,it should have dropped.If so refill the reservoir,and repeat these steps until the cooling fans come on at about 215 or so,and they go back off by themselves.Keep check on the reservoir for a day or so to make sure that the reservoir does not drop to low,the level will finally set.If I can help,let me know.>>>roniecon@gmail.com

Posted on Sep 24, 2009

Testimonial: "thanks for your help! two brass screws 7mm the location of bleeders do you have any idea"

  • 306 Answers

SOURCE: 89 buick lesabre electric cooling fans

You are off to a good start by testing the fans. Get a repair manual from your nearest autoparts store. I find them invaluable. Most temperature sensors can be tested with an Ohm meter. Or short the two wires together to trigger fans. If it has only one wire then ground it to the frame/body (negative side of battery). If none of that works (with ignition on / car off) then relay is bad. Also turning on the A/C should make the fans come on. Car does not have to be running, key in on position. This would eliminate bad relays or not.

Posted on Mar 04, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

I have a 96 Buick skylark.its overheating and I just replaced the thermostat and hose that runs from the radiator to the engine. But its still over heating.what can it be?


Bad water pump, blown head gasket, Clogged radiator, inside and out. If you constantly add coolant, head gasket. If not look to the radiator and pump.

Mar 20, 2016 | Buick Cars & Trucks

4 Answers

I have a 1992 buick skylark v6 3300 it is overheating no leaks no oil in the water or water in the oil no antifreeze in te exaust just changed the thermostat


Probably the water pump, when the engine is completely cool, open the radiator cap, start the engine, turn on the heat full, and check to see if you have circulation at the radiator cap nosal you should see movement of water if pump is good....

Feb 20, 2015 | 1992 Buick Skylark

1 Answer

1995 Buick Skylark, where is the box with the radiator fan relay in it located?


4d6d3003-b7cd-4c62-a0d4-47967f888842.gifHere is where most of your relays are, there is another relay box located inside the car on the passenger side under the dash. Sometimes youll have to take the glove box out to find the second relay box. This should have a cover on it sense most people do not know of this relay box its usually untouched. The cover will tell you what relay does what. But here is a pic with the relay center under the hood and should help you out.

May 07, 2014 | 1995 Buick Skylark

1 Answer

Why does my 92' Buick Skylark keep dying Out.?


You have 2 issues here #1 the engine is running hot . Test the cooling system fans they seem to be not working. #2 car dies i would start with testing the secondary ignition (spark).

Apr 30, 2014 | 1992 Buick Skylark

2 Answers

How do I test the radiator fan on a 1995 buick skylark?


disconnect the cooling fan switch start your engine the fan need start work if don't check your fuse and relay

Mar 20, 2014 | 1995 Buick Skylark

1 Answer

1997 buick skylark temperature sensor location


the radiator fan gets the power from a relay that is energized by a signal from the ECM that in turn gets a report from the coolant temperature sensor
AT this point I would be thinking that there is considerable resistance in the relay
you say the fan works a bit so the temp sensor is reporting toe the ECM which is turning the relay on but power is low from there
replace the fan relay and see if the situation improves
you can test that theory by putting a meter across the wires to the fan when it should be working and reading the voltage available to the fan
if it is not 12 volts or better( 13.2-14 volts) it is the relay

Mar 13, 2017 | Cars & Trucks

2 Answers

1998 Buick Skylark is over heating


You need to check the radiator cap for air leaks and also try having the radiator Flushed as you could have plugged fins inside the radiator, causing the radiator not to cool the antifreeze.

Jul 10, 2009 | 1998 Buick Skylark

1 Answer

Where is the lower hose on 1994 Buick Skylark to drain radiator??


It should ,ost likely be on the right lower sid eof the radiator as you are looking at the car

Jan 17, 2009 | 1997 Buick Skylark

2 Answers

Overheating 1993 Buick Skylark


it could be a fuse or fan relay, or a stuck thermostat, i will recomend to aply stright power to radiator fan to see if works, if don't replace fan and fuse, but if does, then it might be the thermostat, one very easy way to test the cooling fan system is by unpluging the coolant sensor with the car runing, if fan come on whit car runing and sensor disconected, the the system is ok, and might be a bad sensor, or stuck closed or open thermostat. please leave feedback if this take care of your problem

Jul 15, 2008 | 1993 Buick Skylark

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

35 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...