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Cooling fans for 1999 Oldsmobile Alero wont engage

My cooling fans for my 1999 Oldsmobile Alero won't engage and the fuses and relays looks good but I can't find the actual plugins for the fans to work. Where are they located??

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  • Cars & Trucks Master
  • 14,036 Answers

Cooling fans dont work could have faulty engine coolant temperature sensor or ECM.the coolant fans should turn on when engine coolant temperature reach 190 degrees or when you turn on AC. if coolant fans dont turn on when AC turned on your AC refrigerant low or empty which no refrigerant in system the AC low pressure switch remain open no refrigerant in AC system the low pressure switch cant close circuit so they cooling fans will turn on. check see if you have any AC refrigerant in the system.

Posted on May 06, 2013

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: TOYOTA CAMRY 1990 COOLING SYSTEM

First use a test light and make sure you are getting voltage to the fan with the ignition key on and the ac selector in on position.If no voltage check fuse in fusebox or (in linefuse ), If fuses are good check the fan relay switch. If all are good check for broken wire or bad ground.If you are getting voltage to the fan motor or the test light lights up then chances are you have a bad fan motor.

Posted on Nov 19, 2007

bronk50
  • 27725 Answers

SOURCE: My fans have stopped working

click start control panel administrive tools computer management device manager scroll down universal serial bus controllers you should see a yellow question mark?
right click to reinstall drivers
if you can see your usb drive but its not working
ports(com&lpt)right click update driver if this fails to fix the problem
check the USB leads that attach to the motherboard usually red white green black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems for a computer and its parts also
scroll to disk drives if you can see your drive + to expand right click you should see options update driver disable uninstall scan for hardware changes
select properties you should see options in the general tab to troubleshoot policies volumes driver and details under the driver tab you will have the options to check the driver details update driver rollback driver or uninstall
if your computer came with a motherboard disk the drivers could be on it
hope this helps

Posted on May 09, 2011

  • 4 Answers

SOURCE: the location of the cpu cooling fan

On the motherboard, close to the CPU
Open the chassis panel can be seen. Board that,
Indicates that the figure here: http://www.2deals.net/

Posted on Dec 07, 2011

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2 Answers

Where is the cooling fan relay located


In the engine compartment fuse block. Look at positions 7 and 8. There should be a diagram under the lid.

Apr 18, 2016 | 1999 Oldsmobile Aurora

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Radiator fans randomly shut off


  • Relays carry high-amperage current controlled by a low-current switch
  • When a faulty relay is not replaced, the circuit will either be non-functional or remain engaged. here's your relay you need.
http://www.autozone.com/cooling-heating-and-climate-control/relay-radiator-cooling-fan-motor/duralast-relay-radiator-cooling-fan-motor/oldsmobile/alero/1999/4-cylinders-t-2-4l-sfi-dohc/221833_0_0

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My 99 Honda Accords keeps overheating on and off when my car is on park or at a long stop. What can be the problem?


FIRST OF ALL I WOULD REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP THEN CHECK SEE IF COOLING FAN RUNNING.WHILE CAR OVERHEATING. IF NOT CHECK COOLING FAN FUSE AND RELAY.IF ALL IS GOOD THE ENGINE COOLANT TEMPERATURE SENSOR COULD BE FAULTY.HOT WIRE SEE COOLANT FAN WORKS IF NOT, COOLING FAN MOTOR BAD NEED REPLACING.IF COOLING FAN MOTOR WORKING PROBLEM COULD BE IN FAN MOTOR WIRING OR PCM FAILED.

Sep 20, 2011 | 1999 Oldsmobile Alero

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I have a 1999 Alero 3.4 V6 the cooling fans won't run. I checked the fans they both work if I unplug the harness for the temp sensor,the relays and fuses are fine,I replaced the coolant temp sensor and...


CHECK MODE RELAY IF BOTH RELAYS GOOD YOU CAN CHECK RELAY BY REMOVING IT FROM FUSE BOX HOOK RELAY TERMINAL 85 TO BATTERY POSITIVE AND GROUND TERMINAL 86 IF CLICKS RELAY GOOD. IF RELAY GETTING POWER GOOD AND THE 30 AMP COOLING FAN FUSE OKAY.EITHER THERE IS A SHORT IN COOLING FAN WIRING OR THE PCM HAS FAILED.THE PCM HAS LOST OR COMMAND RUN CIRCUIT IN PCM SHORTED OUT DUE TO PCM FAILURE.LET DEALERSHIP OR GARAGE USE DIAGNOSTIC EQUIPMENT TO ACTIVATE THE PCM SEE IF IT HAS FAILED.DONT SPEND MONEY ON NEW PCM COULD BE SHORT IN THE WIRING CIRCUIT

Sep 06, 2011 | 1999 Oldsmobile Alero

1 Answer

I have a 1999 Olds Alero/ I am wondering if there is a fuse for the cooling fan and or the air conditioning fan.


yes. there is a fuse and a relay for the cooling fans and the a/c compressor. you will need to check the power box under the hood that is where most of the relays and there fuses are located.

Jul 27, 2011 | Oldsmobile Alero Cars & Trucks

1 Answer

My Alero heats up when I stop at a traffic light. Everything checks out ok. No leaks, new temp sensor, etc. Any ideas?


CHECK COOLING FAN SEE IF ITS RUNNING.IT NOT CHECK COOLANT FAN FUSE AND RELAY.IF ALL IS GOOD HOTWIRE COOLANT FAN SEE IF IT RUNS.IF NO REPLACE FAN.IF YES CHECK FAN WIRING AND CODE SCAN VECHICLE FOR PCM FAULT CODE.

Feb 26, 2011 | 1999 Oldsmobile Alero

1 Answer

Not sure if radiator fans are working, car overheating. which fuse do I check?


LOOK UNDER THE HOOD IN THE ENGINE COMPARTMENT. ON DRIVER SIDE FOR FUSE BOX.LOOK ON FUSE BOX COVER IT HAS LOCATION FOR FUSES AND RELAYS.MOST TIME PROBLEM WITH COOLING FAN CIRCUIT WILL CAUSE CHECK ENGINE LIGHT.BAD ENGINE COOLANT TEMPERATURE SENSOR WILL CAUSE COOLANT FANS NOT TO TURN CAUSE OVERHEATING. ON.REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP SEE IF STOP OVER HEATING. IF ALL LOOKS GOOD HOTWIRE COOLANT FANS MAKE SURE FAN MOTORS ARE GOOD AND NO SHORTS AT FAN CONNECTOR WIRES.

Oct 02, 2010 | 1999 Oldsmobile Alero

1 Answer

Cooling fan sensor , my car is overheating fans wont come on even while ac is on


you should have a fuse and relay for fan. Those should be checked and also the fan itself

Sep 02, 2009 | 1999 Oldsmobile Alero

1 Answer

Radiator cooling fan


check coolant first .if all good .hot wire the fan make sure the electric fan motor is operating.if runs when hot wire.replace the relay and coolant temperature sensor.if fan dont run.when hot wire.replace the fan motor.

May 30, 2009 | 1999 Oldsmobile Alero

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