Mechanics

HOW DO I INSTALL A MORE "MODERN" COOLANT TEMPERATURE SENSOR?

1990 Chevrolet Corvette • 172,889 miles

My old CTS had a single wire connection, I bought a new on either a better plug on it and it has 2 wires. I can with pigtails to install as needed and the instructions told me to ground 1 wire and connect the other like normal. I didn't want to do this until I hear it's what is right instead of shorting something out.
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Danieljordan
September 1, 2012.




I grounded the second wire as you said, it still isn't reading the temperature. It bounces around the falls all the way down to 260 and twitches. Any other suggestions? Ground is good, verified withe a multimeter. I'm at a loss, I usually always figure these problems out on my own.

Tiny
Danieljordan
Sep 1, 2012.
Coolant sensor is not for the temp gauge. That unit is on the left front head between the first 2 cylinders.

Roy

Yup, sending unit and ECT are two different thing. Disconnect the one that you have installed and note if the gauge works. This is to confirm if you are working at thr right place. The other thing is that you could have bought the wrong item, instead of sending unit you asked for temperature sensor.

KHLow2008
Sep 1, 2012.
Teh temp sender is in the cylinder head normally the drivers side, ground the wire out and if the gauge goes to hot then it needs to be replaced.

Hmac300
Sep 1, 2012.
So the sensor on the rear right of the block doesn't affect my guage, the one by the thermostat does?

Tiny
Danieljordan
Sep 2, 2012.
Yes you are correct.

KHLow2008
Sep 2, 2012.
So is it the one under the TB just behind the Thermostat next to a small vacuum line?

Tiny
Danieljordan
Sep 2, 2012.
It should be a one connector sending unit. Dis connect it and turn ignition switch on. If gauges does not work, ground the wire and check if the gauge goes up to max.

KHLow2008
Sep 2, 2012.
It goes up to make and twitches rapidly at max temp. I think it needs a new wire. I kept the original single wire just cut the connector off and spliced in the new one.
AD

Tiny
Danieljordan
Sep 2, 2012.

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