Coolant temp gauge - Ford Powerstroke Diesel Forum
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Old 03-19-2012, 06:02 PM
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Coolant temp gauge

Trying to figure out why my temp gauge is not working. I replaced both sensors, no go. It doesn't even move, except for maybe twice on really long hauls. What should I be looking for? Really worry-some not to know what my trucks doing
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Old 03-19-2012, 06:07 PM
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Aftermarket guage, or the factory one?
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Old 03-19-2012, 06:12 PM
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Sounds like the gauge head has failed. The temp gauge and oil "gauge" are on one panel, that can be replaced with a boneyard part, and IIRC, LMC has it.
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Old 03-19-2012, 06:12 PM
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Factory in-dash
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Old 03-19-2012, 06:14 PM
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Would it still move occasionally if it failed? plus my OP gauge works. I have a parts truck at my shop in Cali, if thats what I gotta do
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Old 03-19-2012, 06:26 PM
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The oil gauge will still work; separate wiring even though they're in the same panel. It's possible that it's a connection, where the panel plugs into the cluster, or where the wire plugs into the sensor, etc. But if you have a parts truck, it'd be worth popping in that panel from the spare cluster.
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Old 03-19-2012, 06:30 PM
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Ok, i'll the other dash apart as soon as I'm home this week. Thanks, hopefully this'll work
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Old 03-19-2012, 06:42 PM
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Take the wire from your temp sensor and touch it to ground while you have someone watch the gauge. If it moves up to the high range then you have a bad sender.
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Old 03-19-2012, 06:49 PM
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Maybe the tstat is stuck open and the engine never reaches operating temperature. Just a thought.

Rusty
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Old 03-19-2012, 06:53 PM
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Hmm never thought of that. How's the heat output from the heater?
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