Question about 1996 Ford Taurus

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Cooling fan inop

Fan won't come on but has been hard wired to check operation, it works. Temp gauge always reads hot. The temp sending unit has been checked and is within parameters. Why no fan? this is causing an overheating problem.

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It sounds like you have even broken wire or relay fault , do you have test equipmentto check what you have coming in and out of relay

Posted on Oct 23, 2008

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Why does the teptuer gauge go up HOT when the holden comadore vt is idling on the lights and falls back down when you start to drive.


first look to see if the cooling fan(s) come on when the temp gauge reads hot or above half way mark. I suspect the coolant temp sensor is faulty and not sending correct temp reading to pcm and is not turning on the cooling fans.. other possibility is the cooling fans are burnt or relay to fans also ..I would check fans first then relay info back here for more advise.

Jan 31, 2015 | 1999 Holden VT

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Cooling fan wont turn on


you are expecting the wrong temperature unit to control the fan. The temperature sender unit controls the temperature gauge and the temperature sensor unit controls the fan operation. It allows current to go to the ECM and when a pre set temperature is reached the ECM activates a relay and the fan starts . Two completely different units to do two different jobs so if it is doing what you say then there is a possibility that the wires are crossed or shorted.

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1 Answer

Temp gauge peaks on 1993 dodge spirt


I have similar problem in that my rad cooling fan won't run when hooked up to temp sending unit. Sending unit works okay, displaying what seems like proper temps on inside gauge, rising & falling with engine temp. However, my fan does NOT turn on when wire unplugged from sending unit. Tested fan motor with 12v applied directly & it runs fine, so motor okay.

Haynes manual identified a faulty cooling fan relay (in a situation with your symptoms), which is mounted on the drivers side fender of the engine compartment with 1 other on a support bracket (2 others on same bracket if you have ABS), facing forward toward headlight (NOT nearby ones that are parallel to fender, which has 3 relays on a support bracket). This should work in your case, but didn't in mine.

Several of these close-together relays have the same # on them, so you could swap 2, to see if this is your problem, since normally 2 or 3 relays wouldn't fail at same time. To be sure, I bought a new generic relay of proper # from local auto parts store -- about $10-12 I think -- and installed it in the right place but fan still didn't work. Swapped the 2 relays next to each other (there are only 2 on my forward-facing bracket), both with same #, and still no go.

I'm TOTALLY STUMPED on mine, but yours should work with a functioning relay of proper #. Let me know how it goes.

If anyone has suggestions for my related problem, I'm all ears!

Jun 20, 2014 | 1993 Dodge Spirit

1 Answer

2.2L Chevy Cavalier- temp gauge always redline, fan kicks on as soon as car starts but the car is not overheating. Temp sensor? Temp sending unit? Something else? Help!


check the that wire to the temp sender unit is not shorting out as it will read hot if it is remove the wire and if the gauge goes back to cold then replace the sender unit.

Jan 05, 2014 | Cars & Trucks

1 Answer

Engine cooling fan will not opperate


check that you have a thermal switch to switch on the fan and not a temp sender unit. One completes the curcuit when a set temp is reached ,the other is a resistance unit that lowers the voltage which in turn reads hotter on the gauge.

Jan 17, 2013 | 1996 Ford Thunderbird LX

3 Answers

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You may have a bad fan switch if you can find the temp sensor and unplug it the fans should come on but your temp gauge want work but it will get you some air until you find the bad switch. Hope this helped

May 30, 2011 | 1994 Chevrolet Cavalier

2 Answers

Cooling fans on 1994 Caprice classic with 4.3 v8 not coming on. I have replaced the temp sensor on the water pump, temp sensor on the block, all relays, fuses are good, replaced the ecm (engine control...


On a vehicle this age, it is likely that the fans themselves have worn out. Test the fans by running battery power directly to the positive contact. If they start, they are OK. On 4.3 motors, there is also a seperate temp sensor to signal the fans, usually called a fan switch. I believe it operates independent of the ECM. Another possible culprit is a bad ground at the fans or even a loose or corroded negative battery cable.

Jan 26, 2010 | 1994 Chevrolet Caprice Classic

1 Answer

Temp gauge shows hot even if engine has been off overnight?


Locate the temperature sending unit and pull the wire off of it. Turn the key to the on position (do not start) then have someone touch that wire to a ground source and the temp gauge should go from one extreme to another (cold to hot). If the gauge does that, you have a bad sending unit...if it does not move, you have a bad gauge or problem with the wiring to the gauge.

All the temp sending unit does is act like a variable resistor depending on the coolant temp...if it is bad, it will give you a false reading.

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2 Answers

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Check the auxiliary cooling fan for operation. As the engine temp rises, it should kick on to bring the temp down. U may have a bad motor on the fan, or more likely a bad fan switch.

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2 Answers

Cooling fan


so hard wire a kill switch

Jul 30, 2008 | 1999 Chevrolet Cavalier

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