ECT sensor splicing the new one on the old?

2001 CHEVROLET LUMINA
243,000 MILES • 3.1L • 4 CYL • 2WD • AUTOMATIC
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ANGIE COUGHLIN
  • MEMBER
  • 1 POST
I am trying to change my ECT sensor, and I do not know what wires to hook where. is there a diagram you could send me that shows which wire goes to which wire?
Sep 29, 2022 at 5:15 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Hi,

There should be two wires. One is yellow and one is orange with a black tracer. The sensor is basically a resister and receives a low voltage power signal from the PCM. The voltage passes through the sensor and returns to a sensor ground at the PCM. Based on temperature, the resister in the sensor changes the transfer of power.

Okay, why did I say all that? LOL It should work either way you connect the two wires. Power still has to travel through the sensor. I guess you would have rather had me say that first. LOL

If you have a different situation, let me know. Also, the aforementioned wire colors should be the only ones present.

Let me know if this helps.

Take care,

Joe

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Sep 29, 2022 at 12:16 PM
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