No reading on temperature gauge

AARON SMITH4

MEMBER
2002 FORD RANGER
3.0L
6 CYL
2WD
AUTOMATIC
150,000 MILES

I recently rebuilt my 3.0 v6 and it is running great now. But I’m not getting a reading on my temperature gauge. I’ve replaced both sensors and checked the connections and everything looks good, no corrosion. I’m at a loss here. Thermostat is new as well as the radiator. Any ideas?

7 Replies

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

Since you've replaced both sensor then it sound like you might be having trouble with the wiring or gauge in the instrument cluster. I've attached the instrument cluster wiring diagram below. I've cut the picture in half so you can view larger. Here is a tutorial showing how to test wiring:

https://www.2carpros.com/articles/how-to-check-wiring

Hope this helps and thanks for using 2CarPros.

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Saturday, December 5th, 2020 AT 11:56 AM

AARON SMITH4

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4 POSTS

Thank you Danny I’ll try this out!

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Saturday, December 5th, 2020 AT 2:29 PM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

Okay, keep us updated as to what you find. Hope this helps and thanks for using 2CarPros.

Danny-

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Saturday, December 5th, 2020 AT 3:15 PM

AARON SMITH4

MEMBER
4 POSTS

So it turns out it has a temperature switch for the gauge on the down spout in front of the thermostat housing. There were two temperature sensors instead of the correct temperature sensor and temperature switch.

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Saturday, December 5th, 2020 AT 7:37 PM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

So did you replace the other temperature switch and that solved the problem or is the gauge still not working? Let us know and keep us updated. Thanks again for using 2CarPros.

Danny-