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Jeep Wrangler YJ
YJ General Discussion
Running Rich
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<blockquote data-quote="machoheadgames" data-source="post: 433426" data-attributes="member: 18789"><p>No, it doesn't work off 12V. It works off resistance. One of the wires should go to ground and the other goes to the computer. The computer is looking for a relationship of resistance to ground. The sensor interrupts the connection between the two wires by being very resistant at low temps and lowering the resistance when the sensor warms up. Whatever ohm reading to ground the computer determines from that sensor's ohm reading, is how it knows the coolant temp.</p><p></p><p>When it's cold there should be so much resistance that I don't think you should have continuity, it would be an open circuit. And as I said there is no 12V so you definitely won't find that. </p><p></p><p>Check out this link:</p><p></p><p><a href="https://www.fixjeeps.com/coolant-temperature-sensor.html" target="_blank">CTS Test</a></p></blockquote><p></p>
[QUOTE="machoheadgames, post: 433426, member: 18789"] No, it doesn't work off 12V. It works off resistance. One of the wires should go to ground and the other goes to the computer. The computer is looking for a relationship of resistance to ground. The sensor interrupts the connection between the two wires by being very resistant at low temps and lowering the resistance when the sensor warms up. Whatever ohm reading to ground the computer determines from that sensor's ohm reading, is how it knows the coolant temp. When it's cold there should be so much resistance that I don't think you should have continuity, it would be an open circuit. And as I said there is no 12V so you definitely won't find that. Check out this link: [URL='https://www.fixjeeps.com/coolant-temperature-sensor.html']CTS Test[/URL] [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Running Rich
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