Question about Cars & Trucks

1 Answer

My 1986 pontiac firebird has been overheating. I replaced the radiator, fan switch sensor, and the fan still won't kick on when it reaches high temperatures. The fuse is not blown and the fan works. I tested it by connecting it to the battery directly. Could it be the relay? If so where is it located?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 5,678 Answers

How about thermostat,air look.

Posted on May 06, 2013

Ad

5 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.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
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

Ad
Benimur
  • 6966 Answers

SOURCE: Radiator fan not working

Hi,

I am assuming that you are referring to the radiator fan. You need to verify that the fan motor is receiving 12V when it is supposed to be kicking in (engine hot) with a DVM (voltmeter) in its actual location. Having done this and likewise verifying that the ground is properly attached/connected, then your problem would be with the "clutch". Radiator fan clutch differs from aircon compressor clutch which is electrical and the transmission clutch which is mechanical. Most radiator auxiliary fans (not directly coupled) uses "silica oil". This oil has an inverse property, that is when hot it gets thicker and thus the rotation of the motor is transferred to the blades. There would be a filling hole adequately plug in or near the front of the fan assembly.

If your concern is not corrected by the addition of silica oil or if you can not measure 12V on the fan connector itself when it is supposed to kick in, then chances are your problem is electrically related. Some fan motor switching systems are coupled to the aircon switching.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on May 29, 2008

  • 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

  • 193 Answers

SOURCE: Radiator fan not working

Hi. Check the bottom of the radiator or on the side, as you also have a temperature-sending switch. The switch must reach a certain temperature before sending a signal on to the fan relay.

The switch just screws into the radiator.

If you would like to contact me again about this or other problems, feel free to do so.
Bill
ASE Master Technician

Posted on Nov 26, 2008

  • 21 Answers

SOURCE: Radiator fan will not kick on in a 07 pt cruiser.

If you are in a hot climate and use the AC year round like I do, it is possible that the fan motor itself is worn out. My 2003 had this occur and it progressed to idling problems before it was resolved.

The motor has carbon brushes inside it which do wear out with use. The brushes are staggered (I dis-assembled mine as a post-mortem). At idle, both brushes are in use. At highway speed only one brush is in use. Directly attaching the battery gave it normal voltage - but much more current than normal. That is why it worked.

My solution is to replace the fan motor with a BRAND NEW one. A salvage part would work, but you run the risk of not knowing how worn its brushes are. New fans are available w/o the shroud and fan blade at many parts stores. Mine took a week on special order and cost around $150 for one with a lifetime warranty. Pretty straightforward to swap out - just make sure the wiring connector is correct before you disassemble the shroud. The replacement motor had the wiring located slightly different, but I was able to easily drill the plastic shroud and re-route the path of the wires.

Posted on Jul 07, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

2004 jeep grand Cherokee's radiator fan won't run on high


Hi Al, I'm glad to help!

Three possible causes: (1) The high speed circuit in the radiator fan motor could be defective. (2) The high speed fan relay Could be defective. (3) It possibly may have a wiring issue. I've seen at times where you can wiggle the fan motor connector that's mounted on the fan shroud and the motor will kick on. If this is the case then replace the hole assembly which is a motor and shroud assembly. Hope this helps and have an awesome day.

Aug 24, 2012 | Cars & Trucks

4 Answers

1986 Mazda 323 coolant fan comes on when motor is hot and stays on.


Is the engine actually cooling off? If the temp switch isn't seeing a drop in temperature, it will keep the fan running.

Oct 02, 2017 | Cars & Trucks

1 Answer

Cooling system problem for Pontiac Grand Am GT 1999, Starts overheating when sitting still but starting the A/C helps cool it.


If it has an electric radiator fan (not AC fan) The radiator fan is not working. Possible coolant sensor or switch.

Apr 02, 2017 | 1999 Pontiac Grand Am GT

1 Answer

Engine fan does not engage when temperture reaches 200


Check your fuses and relays. start with replacing those. Temp sensor is apparently working, so if it's not the relay, it could be the fan. it is 24 years old

Dec 23, 2010 | 1986 Pontiac Firebird

1 Answer

ELECTRIAL FAN WON'T KICK IN WHEN TEMP IS REACHED


You need to see if you have power to the fan when it should be on. If so then your fan is bad. If not then it isn't beening told to come on. There is a one wire switch in the block that can go bad. Also the relay may have gone bad. Need to test the whole circuit before throwing parts at it.

Oct 11, 2009 | 1986 Pontiac Firebird

2 Answers

Radiator Fan dont kick on


The fan will kick in when the temp reaches 90 degrees celcius. It could also be a bad fan or a bad fan relay

Aug 12, 2009 | 2003 Pontiac Grand Prix

2 Answers

Cooling fan does not work,new fan just installed,will not "kick in"when car warms up.overheating.


I would suspect a faulty or malfunctioning cooling fan switch. Go to the autozone website and register your car. It doesn't cost anything and will give you access to an online repair manual for your car. The inspection/testing/replacement procedures for the cooling fan switch should be available there. Hope this helped and best wishes.

Aug 03, 2009 | 1987 Pontiac Firebird

1 Answer

Coolant fan


3 things to check, 1st, temp switch (controls turning fan on and off according to eng. temp, 2. cooling fan control, tells switch when to turn on and off, and 3. fan motor. Check it to make sure it isn't shot.

May 05, 2009 | 1999 Pontiac Firebird

2 Answers

1997 firebird radiator fans are not coming on.


So if you tried another relay & they work, you need a new relay, right?

Apr 19, 2009 | 1997 Pontiac Firebird

1 Answer

Overheating 97 V6 pontiac grand am


1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Belt Incorrectly routed, adjusted, tensioned, missing, or worn water pump belt(s). grey_line.gif 3 Inspect Oil Pan Gasket - Performance Ruptured, cracked or leaking radiator hose. grey_line.gif 4 Inspect Radiator Cap Worn or damaged radiator cap grey_line.gif 5 Inspect Thermostat Thermostat stuck closed grey_line.gif 6 Inspect Fan Blade Broken, missing, or defective fan blade(s). grey_line.gif 8 Inspect Water Pump Damaged, worn or leaking water pump. grey_line.gif 9 Inspect Intake Manifold Plenum - Perform Leaking water pump gasket. grey_line.gif 10 Inspect Cooling Fan Control Faulty cooling fan control or circuit. grey_line.gif 11 Inspect Cooling Fan Switch - Radiator Faulty radiator cooling fan switch or circuit. grey_line.gif 12 Inspect Engine Temperature Sensor Faulty engine temperature sensor or circuit. grey_line.gif 13 Inspect Temperature Switch Damaged or faulty temperature switch or temperature switch circuit. grey_line.gif 14 Inspect Fan Clutch Worn, loose or faulty fan clutch. grey_line.gif 15 Inspect Ported Vacuum Switch Damaged, leaking, or faulty ported vacuum switch. grey_line.gif 16 Inspect Radiator Obstructed radiator core or radiator cooling fins. grey_line.gif 17 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders

Dec 01, 2008 | 1997 Pontiac Grand Am

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

Related Topics:

77 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76649 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 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...