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Temperature sensor diagram

Tiny
IGENIUS92
  • MEMBER
  • 1997 CHEVROLET CAMARO
  • 3.8L
  • V6
  • 2WD
  • MANUAL
  • 156,000 MILES
Hi, does anyone know the wiring diagram for the temperature sensor? Which color wire is which? I am hooking up a digital gauge and I want to make sure I am tapping into the right wires. There are three wires total on the wire harness that goes to the temperature sensor.
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Tuesday, July 31st, 2018 AT 12:50 AM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

I attached a wiring diagram for you to view of the coolant sensor and the gauge unit in the dash.

Do not tap into anything. You will need to run a separate harness for your unit. You may interfere with fuel mapping from the PCM.

Roy
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Tuesday, July 31st, 2018 AT 3:49 AM
Tiny
IGENIUS92
  • MEMBER
  • 205 POSTS
How would I run a separate harness for an aftermarket digital temperature gauge? And tapping into the dark green wire which goes to the temperature gauge on the cluster inside the vehicle could mess up the fuel mapping?
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Friday, August 3rd, 2018 AT 12:34 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Do not tap into any wire in the computer harness at all. You will cause nothing but havoc with the system.

You could get a Y adapter where the coolant sensor mounts and install your temperature sensor from your kit. Then you can provide power from the fuse box and the return wire would go the digital gauge.

Roy
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Friday, August 3rd, 2018 AT 2:03 PM
Tiny
IGENIUS92
  • MEMBER
  • 205 POSTS
Well, the the original temperature sensor has three pins one to the computer one ground and one to the gauge inside the car. That is the wire I wanted to use for the gauge, but if I tap into the wire for the gauge you said would create havoc which I do not want. So without removing my original temperature sensor and wire harness from the sensor how would I hook the aftermarket temperature gauge up?
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Monday, August 6th, 2018 AT 11:19 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You would need to find a new place for the new sensor to go. Look around the head for a welch plug for the cooling system. You could remove it and install your sensor there and run your wiring according to the directions with the gauge.

Roy
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Monday, August 6th, 2018 AT 11:23 AM
Tiny
IGENIUS92
  • MEMBER
  • 205 POSTS
Good idea thank you very much! I will let you know the results.
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Monday, August 6th, 2018 AT 2:31 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Feel free to return for follow up questions.

Roy
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Monday, August 6th, 2018 AT 2:33 PM

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