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Old Sep 1, 2010 | 05:30 PM
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Anyone know how the 98' coolant temp sensor is suppose to be wired? i'm trying to distinguish which is the pwr, ground, and signal for the gauge.
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Old Sep 1, 2010 | 06:28 PM
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Originally Posted by deuce4935
Anyone know how the 98' coolant temp sensor is suppose to be wired? i'm trying to distinguish which is the pwr, ground, and signal for the gauge.
One wire is ground
One wire is the sensor for the PCM and the other wire is the sensor for the gauge
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Old Sep 1, 2010 | 08:51 PM
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Any ideas as to which color represents what. I'm sure that black is ground, but then theres a red and green wire, these things aint exactly cheap and easy to find at the local parts store.
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Old Sep 1, 2010 | 11:13 PM
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Pin, Wire Color, Circuit No., Function

A, BRN, 718, Engine Coolant Tenperature (ECT) Sensor Ground

B, YEL, 410, Engine Coolant Temperature (ECT) Sensor Signal

C, DK GRN, 135, Engine Coolant Temperature (ECT) Sensor Output
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Old Dec 16, 2010 | 11:07 AM
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Anyone have a part number for a '98 LS1 coolant sensor? The 3 wire thing is hard to find vs the later 2 wire style.

Thanks!!
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Old Dec 16, 2010 | 11:38 AM
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http://www.gmpartsdirect.com/results.cfm part #12551708

Last edited by bjamick; Dec 16, 2010 at 11:46 AM.
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Old Dec 16, 2010 | 02:15 PM
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Pin C goes to the Gauges, the other 2 go to the PCM.
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Old Dec 16, 2010 | 03:53 PM
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Originally Posted by Ford_Assassin
Anyone have a part number for a '98 LS1 coolant sensor? The 3 wire thing is hard to find vs the later 2 wire style.

Thanks!!
The Standard part number is TX111
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Old Dec 17, 2010 | 05:50 PM
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Any after market gauges work with that 3 wire sensor?
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Old Dec 18, 2010 | 08:18 AM
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If the resistance/temp value of the GM sensor is the same as the aftermarket sensor you should be able to use it. You would have to do some research to determine that, though.


Good info here.
I am doing an LS swap into my '96 and want to keep all the gauges in my original cluster functional for a seamless integration.
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Old Dec 18, 2010 | 08:33 AM
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Not sure but here's an old post with the 98 resistance/temp values.
https://ls1tech.com/forums/conversio...auge-59-a.html
Originally Posted by Monte4ever
Any after market gauges work with that 3 wire sensor?
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