Temperature gauge not working

2000 VOLVO S70
158,000 MILES • 5 CYL • 2WD • AUTOMATIC
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DKMC
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  • 2 POSTS
At first, the gauge was working fine. It was, however, reading higher than I would have expected so I thought maybe the thermostat and/or the sensor switch had gone bad. The temperature gauge worked on my way to the repair shop but once they replaced the thermostat and sensor switch the gauge stopped working. The shop owner said they drove the car a little and had a tester hooked up. He said the temperature got to around 195 which I guess is normal and said because his tester was getting readings that meant the sensor switch was working. I got home and the cooling fans were running which, I do not remember them doing much in the past. Did this mean the engine was too hot? Is there another connection between the sensor switch and the dash temperature gauge that could have gone bad/gotten disconnected?
Jan 8, 2018 at 5:42 PM
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STRAILER
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Hello,

Yes you must have a bad connection/broken wire going to the gauge. Here is a wiring diagram to help us test the circuit and a guide to show you how.

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

Check out the diagrams (Below)

Please let us know what you find.

Cheers, Ken
Jan 10, 2018 at 12:00 PM