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Post by fullthrottle on Jul 6, 2021 3:38:37 GMT -5
I am trying to trouble shoot a temp gauge problem. the gauge varies from 80-175 degrees, it slowly climbs to 175 then drops quickly back to 80? on the thermostat housing there are 2 electrical sensors one has 2 wires the other has 1 wire. witch one runs the temp gauge and what does the other one do?
2002 regal 18 ft lsr carb 4.3
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Post by sgilbert on Jul 6, 2021 8:07:22 GMT -5
No clue, but disconnecting one or the other will certainly show up something.
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Post by hawker63 on Jul 6, 2021 11:19:09 GMT -5
Obviously the 175 makes sense. I would be surprised that the water gets back to 80’s so the idea it’s sender makes sense. I am more inclined to lean to gauges. If it drops and you tap it, and problem Goes away, it’s the gauge.
My guess is it’s the 2 wire sensor as most thermocouple devices are based of a current generated by 2 different metal alloys. I can’t think of anything working off one wire so now I am intrigued. Let us know
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Post by gofast24 on Jul 10, 2021 10:33:04 GMT -5
Most older engine I know of have single terminal switch). the switch either opens or closes on high coolant temp. sender just changes resistance to the temp gauge (just a voltmeter in disguise) most likely two terminal sender. Check for corroded wires/terminals and these units are cheep, buy one, replace, if not problem, buy second. Dont think bad gauge?
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