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1998 Ford Fiesta gauge

Tiny
SKELLEY
  • MEMBER
  • 1998 FORD FIESTA
Electrical problem
1998 Ford Fiesta Manual

my temp gauge isnt working neither is my fan
changed two sensors one which is for temp gauge and supposedly fan and other for coolant, neither has worked could it be electrical
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Sunday, March 21st, 2010 AT 2:21 PM

12 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
It could be electrical, but we need to verify first if the fan even works, so you will need to hardwire the fan to the battery or another power source to see if it will come on, if not then you know the motor is bad or the radiator fan relay is bad.
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Sunday, March 21st, 2010 AT 3:05 PM
Tiny
SKELLEY
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Thanks for that info. My son tried that and the fan does come on so do you think that is a possible break in the wiring.
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Monday, March 22nd, 2010 AT 12:53 PM
Tiny
LEGITIMATE007
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I think the engine coolant temperature sensor is the culprit. Its not telling the computer how hot the coolant/engine is therefore the computer cannot activate the fan, this will also cause bad fuel economy
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Monday, March 22nd, 2010 AT 12:59 PM
Tiny
LEGITIMATE007
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And will cause your car to overheat and ultimately cause bigger issues
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Monday, March 22nd, 2010 AT 1:01 PM
Tiny
SKELLEY
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That sounds logical but my son was advised to test if the coolant sensor was working to cut the wires and then re connect them he was told if the fan came on it was a faulty sensor if it didnt come on then it wasnt that it didnt come on would it be worth me spending money and replacing it I was quoted around 20 pounds
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Monday, March 22nd, 2010 AT 1:14 PM
Tiny
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Thats the craziest thing I've ever heard, "cut the wires and reconnect them?"" Wow. Tell your son to take it out and ohm test it.
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Monday, March 22nd, 2010 AT 1:17 PM
Tiny
LEGITIMATE007
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Otherwise just replace it.
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Monday, March 22nd, 2010 AT 1:18 PM
Tiny
SKELLEY
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I will get him to do that, if its replaced, which will then mean I have replaced both sensors, could there be any other possible reasons for my fan and temp gauge not working
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Monday, March 22nd, 2010 AT 1:30 PM
Tiny
SKELLEY
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I have just spoke to my son and he says that he did not cut the wires. He was advised to take the 2 wires from the coolant sensor and touch them together and in theory if the fan came on then it was the sensor that needed replacing. The fan did not come on. Should I still replace the coolant sensor.
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Monday, March 22nd, 2010 AT 3:54 PM
Tiny
SKELLEY
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What is an ohm test
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Monday, March 22nd, 2010 AT 5:03 PM
Tiny
LEGITIMATE007
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Yes, because we know the fan works right? We hardwired it to the battery and it came on. So we need the coolant sensor, in theory, this is the problem
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Monday, March 22nd, 2010 AT 8:51 PM
Tiny
SKELLEY
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Thanks I will purchase a coolant sensor and get my son to fit it. Fingers crossed this will solve the problem thanks for the advice
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Tuesday, March 23rd, 2010 AT 3:12 AM

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