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Temperature gauge not working

Tiny
JEFF HILL
  • MEMBER
  • 1997 FORD F-250
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
I need help on how to get my temperature gauge working please.
Wednesday, May 29th, 2019 AT 10:04 PM

22 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

There is a sensor for the engine temperature on the front of the driver's side head.

I attached a picture for you to view. This is the most common reason for the gauge not working.

Roy
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Thursday, May 30th, 2019 AT 3:24 AM
Tiny
JEFF HILL
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Okay, but when I plug my scanner in to the OBD2 diagnostic connector it reads the engine temperature. That's why I thought the cht sensor was okay and it had to be the ECT on the intake it has both?
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Thursday, May 30th, 2019 AT 5:09 AM
Tiny
ASEMASTER6371
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If it is reading engine temperature on the scan tool, then you either have wiring issue from the ECM to the dash or the cluster is bad.

Roy
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Thursday, May 30th, 2019 AT 1:32 PM
Tiny
JEFF HILL
  • MEMBER
  • 21 POSTS
I tried a used cluster that was working in the other truck and it didn't fix problem. Then I jumped the two wires at the engine cooling sensor and the gauge pegged to hot so I assumed the wiring was okay.
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Thursday, May 30th, 2019 AT 7:45 PM
Tiny
ASEMASTER6371
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Change the coolant sensor.

Roy
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Friday, May 31st, 2019 AT 2:44 AM
Tiny
JEFF HILL
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  • 21 POSTS
I did replace the ECT twice one from Rock Auto and One from NAPA and the plug wire to and tested the red with white wire it has 10 K oms.
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Friday, May 31st, 2019 AT 7:28 AM
Tiny
JEFF HILL
  • MEMBER
  • 21 POSTS
The yellow and red wire is it the ground wire?
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Friday, May 31st, 2019 AT 7:31 AM
Tiny
ASEMASTER6371
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No, neither are grounds. The sensor has 5 volts going to it and the other is a return signal wire to the PCM. Then the PCM sends a signal to the dash for the gauge.

Do you have a scan tool that can read engine temperature?

Roy
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Friday, May 31st, 2019 AT 8:18 AM
Tiny
JEFF HILL
  • MEMBER
  • 21 POSTS
Yes I do. But what is the voltage for red with white wire at ECT sensor unplugging with key on. And same question for yellow with red wire?
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Friday, May 31st, 2019 AT 8:41 AM
Tiny
JEFF HILL
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I know I need to test wiring from PCM to gauge cluster, but have no information on test procedure and no information for pin location for connector at PCM and gauge cluster.
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Friday, May 31st, 2019 AT 8:50 AM
Tiny
ASEMASTER6371
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Okay, I attached a diagram for you to view.

This is not something you can test with a voltmeter. The only thing you can do is to check the connector at the back of the cluster. The controls for the gauge are in the solid state unit in the cluster.

Roy
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Friday, May 31st, 2019 AT 12:38 PM
Tiny
JEFF HILL
  • MEMBER
  • 21 POSTS
Can you please send me a clear copy or a link that I can see or download? Thanks, Jeff
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Friday, May 31st, 2019 AT 7:26 PM
Tiny
ASEMASTER6371
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You can try this link:

Roy

https://www.2carpros.com/images/question_images/271687/original.jpg
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Saturday, June 1st, 2019 AT 4:55 AM
Tiny
JEFF HILL
  • MEMBER
  • 21 POSTS
You have helped me, but I need a complete image of cluster wiring.
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Saturday, June 1st, 2019 AT 8:13 AM
Tiny
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That is the only image of the cluster. As I stated before, there is nothing you can check internally as it is controlled by a microprocessor in the cluster itself.

Roy
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Saturday, June 1st, 2019 AT 8:16 AM
Tiny
JEFF HILL
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Okay, thank you for your time. I just was hoping for a link or a web sight that I could look up images on my own.
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Saturday, June 1st, 2019 AT 8:45 AM
Tiny
ASEMASTER6371
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You could go to Alldata. Com and get a one day pass or longer and get all the information you want. Well worth it.

Roy
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Saturday, June 1st, 2019 AT 11:38 AM
Tiny
ASEMASTER6371
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Did you respond? I got a notification but no response.

Roy
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Sunday, June 2nd, 2019 AT 5:34 AM
Tiny
JEFF HILL
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  • 21 POSTS
Thank you, but I don't have a credit card.
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Sunday, June 2nd, 2019 AT 6:18 AM
Tiny
ASEMASTER6371
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There is no charge for anything in our site?

Roy
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Sunday, June 2nd, 2019 AT 6:29 AM

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