Question about Ford F-450

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1 HAVE A 1968 FORD RANCHERO WITH A TEMPERATURE GAUGE THAT IS INOP GAUGE APPEARS TO BE JUST A LIGHTED INDICATOR VEHICLE HAS AFTERMARKET TEMP SENDER IN IT NOW FOR A SUNPRO GAUGE REMOVED IT AND INSTALLED OE SENDING UNIT BUT HARNESS HAS BEEN CUT UNABLE TO FIND CORRECT CIRCUIT WOULD LIKE TO KNOW WHAT COLOR CIRCUIT IM LOOKING FOR IN THE HARNESS ALSO IF TEMP GAUGE IS ACTUAL GAUGE OR A LIGHT VEHICLE IS EQUIPPED WITH A 289 C.I. ENGINE

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Probably just a Light to be honest, in 68 you are lucky to get that. probably just a single black or yellow wire running under the dash, to the thermostat and sensor

Posted on Jul 20, 2009

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1995 Ford Ranger 2.3 L coolant temperature gauge not working like it should


possible low coolant level
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with the ignition switch on , the gauge should go straight to hot
that indicates the circuit and gauge is operational which leaves the coolant level and sender unit

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Why does the temperature gauge reads hot when switch is turn on Nissan frontier 98


If your temperature gauge reads hot as soon as you turn the ignition on it's probably due to a faulty temperature sender. The link below may show you the location of that sensor:

nissan frontier temperature sender Google Search

The sensor is very easy to change. It just screws into the block. It may have a 'brass' appearance and have either 1 or 2 electrical wires attached.

To change it, simply disconnect the wire and then use a wrench to unscrew it.

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Truck never reaches operating temperature


low operating temperatures is an indication of an air lock in the cooling system
gauges need the sender unit to be fully immersed in coolant to work but if they are not then the variable resistance material in the sender bulb cannot accurately relate to the coolant temperature
example if you have leak develop in a good system and you do not regularly scan your gauges like a good drive will do. it is possible that you will smell a dying engine yet when yo look at the gauge it will be reading cool to cold because the coolant has dropped to a point where the sender is no longer in contact with the coolant

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1 Answer

I have a 2007 Chevrolet Equinox and had my cluster repaired for the temp gauge. Now it works but will not drop the entire way after it cools down. I was told that this is a temp problem with GM vehicles...


From what I just read about your vehicle,it has a history problem with the gauge,may be the coolant temperature sender or the gauge,it says the whole cluster will have to be changed to be fixed if the gauge is bad,found some forums and all had gauge problems.Right above the coolant temperature sensor is the coolant temperature sender,this is what sends the temperature to your gauge,the sensor sends a signal to the computer,they may have replaced the wrong one,here's a link to the sensor,the hole above it is where the sender goes,it's a one prong part,the sensor is a 2 prong part.A lot of people don't know that there are 2 types of coolant temperature gauge sending unit and sensor.

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if the temperature gauge never moves its probably just the coolant temperature sender. Replace that. but i honestly recommend buying a new temperature gauge with more accurate readings. they arent very pricey and they are easy to install

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2 Answers

Which side ofintake manifold does temperature gauge sending unit go on


Water Temperature Indicator Sender Unit
The water temperature indicator sender unit is installed on the engine into an engine coolant passage. The water temperature indicator sender unit reacts to the engine coolant temperature. Its resistance decreases as the engine coolant temperature increases.

Water Temperature Indicator Sender Unit Removal
swb~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not mix Standard (green) Coolant with Extended Life Coolant (orange). If mixing occurs, drain engine cooling system and refill with originally equipped coolant type. If this contamination occurs the service change interval on Extended Life Coolant will be reduced from 6 years/150,000 miles to 3 years/30,000 miles.
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1 Answer

My temperature gauge is not working


take the single wire lead off the temp sender and ground it, if gauge goes all the way to hi , you need a temp sender, if no change then you have a wire issue or need a temp gauge

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1 Answer

Teampreature gauge not working


Sounds like you have installed a 'over-temperature switch' type sender unit- this type of sensor is only meant to control an over-temperature alarm indicator lamp that is either 'on' or 'off'.

The temperature gauge requires a 'variable resistance type' temperarure sensor to control the meter deflection.
When cold the temperature sensor is of high resistance, hence less meter deflection;
when hot temperature sensor is of low resistance, hence more meter deflection.

You need to procure a matching sensor to suit the type of gauge installed.

Is it possible you have connected to the temperature wrong temperature sensor? - most vehicles are fitted with both a gauge type (variable resistance) sensor to drive the temperature gauge, as well as a switch type (on or off) sensor to drive the overtemp indicator light.

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3 Answers

Temp guage not working


If it stays "down" as in completely not getting any tempature at all? Not even too 100 degrees Farenheit,? Then more than likely its just the sending unit. Using alldata.com I found the location of the sensor:

On your 1997 Ford Escort (2.0L SFI SOHC), the Coolant Temperature Sensor is located: clearpixel.gif Under hood, driver side, upper engine area, below valve cover, mounted in cylinder head

When ordering the part be sure that if they do ask, which they shouldn't tell them you need the one that controls the gauge not the ECM, alldata.com shows your car only using one sensor for both.

Obviously check the wiring terminals that go to this sensor before ordering pull the plug out and check for corrison or broken wiring in the harness its self.

Let me know if I can farther assist you with your problem, thank you for using fixya.com

Sep 21, 2008 | 1997 Ford Escort

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