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Old 02-28-2007
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temp gauge

i have a 94 ranger my temp gauge does not move and i think my fan is always on help please
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Old 02-28-2007
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Old 02-28-2007
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that means the thermostat is stuck open i still get heat so if i replace the thermostat that will solve it and my temp gauge will work too
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Old 02-28-2007
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if your still getting heat your temp gauge might just be broken...does it move at all?

usually with a bad thermostat or siezed fan clutch youll get about 1/4 way up the gauge so that may or may not be it depending on your circumstances...
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Old 02-28-2007
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does not move
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Old 02-28-2007
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if you have a multimeter you can check the power from the sensor... more then likley its either broken or wire is cut somewhere...

heres what it looks like on my 3.0, not sure about your 2.3...the light brown plug...

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Old 02-28-2007
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is this something i should worry about i dont know anthing about a ranger just bought a couple days ago?
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Old 02-28-2007
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not vital for the truck to function, but if you start to overheat youll never know it which will lead to very bad things...cant tell you a price on that part but i cant see it being much... my autometer gauges came with a new sensor and with the gauges the total was only 40$...
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Old 02-28-2007
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thanks for the help
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Old 02-08-2008
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Quote:
Originally Posted by jtslmn720 View Post
if you have a multimeter you can check the power from the sensor... more then likley its either broken or wire is cut somewhere...

heres what it looks like on my 3.0, not sure about your 2.3...the light brown plug...

is that sensor pictured for the gauge, or for the ECT?
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Old 02-08-2008
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the brown plug (single wire) is for the gauge... the ECT is on the driver side around the radiator i believe
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Old 02-08-2008
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for the 2.3L the temp sender for the gauge is mounted in the driverside of the block near the firewall. You really cant get to it from above but it's not tough to get to from below. It is a one wire sending unit and it is cheap at the parts store if you feel like replacing it. Be sure to have the new sending unit ready with teflon tape on the threads because when you pull out the old one coolant is gonna start flowing out onto you. Be sure you ask for the temp SENDING unit and not the temp sensor. The sensor is mounted in the heater hose at the front of the engine and is a multiwire sensor that runs the ECU and has nothing to do with the gauge.
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Old 02-08-2008
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correct me if im wrong, but isn't the sensor on the cyl head for the oil pressure?

on my 97 both of the coolant sensors are on the thermostat housing or right next to it on the hose.

the red one is for the cluster, and the light gray sensor is for the ecu, if you need the light gray one i have an extra one.
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Old 02-09-2008
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you are correct that the sending unit mounted on the driverside rear of the HEAD is the oil pressure sending unit, but I said the sending unit mounted on the driverside rear of the BLOCK. They are both one wire sending units, the coolant one is under the oil one. On the 94 they are still in seperate places, they changed things once they got newer and went to a plastic thermostat housing.

With the fan being on all the time, its a mechanical clutch and its really easy to check to see if its locked up or not. When the truck is cold and NOT RUNNING grab the fan and see how easy it is to spin it. It should be easy, there will be some drag to it but it shouldn't take any effort to spin. Then when the truck is good and hot with it NOT RUNNING do the same thing. It should be hard to turn with a lot of drag when it's good and hot.
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Old 02-20-2008
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yes the temp sensor for the gague is on the drivers side of the block near the back of the motor.(changed mine about 3 weeks ago) but to be on the safe side of making sure your truck will not over heat and you not know about it i would do both a thermostat and the temp sending unit. it sounds to me like the sending unit has gone bad. either way the parts are 3.99 for the temp sending unit and no more than $10 for the thermostat. so 15 dollars is WAY cheaper than a new motor would cost because of overheating. i decided to change mine because the gague was reading really low(cold) but my heater was still as hot as it had ever been. changed it and now it reads right in the middle like it is supposed to. Oh yeah i almost forgot the sending unit does not look anything like what is in the pictures on this thread
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