1990 Temp Gauge stuck
Thread Starter
Racer
Joined: Sep 2004
Posts: 495
Likes: 1
From: Spokane Washington
1990 Temp Gauge stuck
I have a 1990 convertible all stock with 67000 miles on it, It is keeping me going while I finish my 73, 69 and 61. I have a problem with my temp gauge. It was getting a little warm and the gauge started to jump a little then barried it self past the 260 mark. The car was not over heated. The gauge stays barried with car off, battery diconected, and temp sensor wire diconected. The sensor wire conectors have no resistemce when tested, so they apear to not be shorted.
1. Is my gauge broken?
2. What other test can I run?
3. If it is my gauge is it easy to remove?
I am new to these electro cars.
cal
1. Is my gauge broken?
2. What other test can I run?
3. If it is my gauge is it easy to remove?
I am new to these electro cars.
cal
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
The sensor for the Temp. gage is located on the passenger side head between the #8 and #6 spark plugs.
It has a single green wire with a spade lug going to the sensor.
With the ignition on engine off, if you disconnect the green wire, the gage needle should be all the way to the left (Cold). If it doesn't the temp. gage is bad. If it dose the sensor is bad.
If you ground the green wire with the ignition in run (engine off), the temp. gage needle should move all of the way to the right (Hot). If it doesn't the gage is bad. If it does the sensor is bad.
I've never heard of anyone selling the temp. gage by itself.
You can get a used cluster for around $50 and up on E-bay.
It has a single green wire with a spade lug going to the sensor.
With the ignition on engine off, if you disconnect the green wire, the gage needle should be all the way to the left (Cold). If it doesn't the temp. gage is bad. If it dose the sensor is bad.
If you ground the green wire with the ignition in run (engine off), the temp. gage needle should move all of the way to the right (Hot). If it doesn't the gage is bad. If it does the sensor is bad.
I've never heard of anyone selling the temp. gage by itself.
You can get a used cluster for around $50 and up on E-bay.
Last edited by Hooked on Vettes; Mar 14, 2005 at 11:54 AM.
Thread Starter
Racer
Joined: Sep 2004
Posts: 495
Likes: 1
From: Spokane Washington
1990 Temp sensor
If the sensor on the passenger side is the temp gauge sensor, (I did disconnect that one also and the gauge did not move) what is the sensor on the intake manifold under the throtle body.
thanks
cal
thanks
cal
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
That's used by the computer to determine engine coolant temp.
The sensor you're talking about can only be read by using a scan tool, or a aftermarket software program.
I think you can also place the CCM (Central Computer Module) in diagnostic mode and push some buttons on the DIC. (Driver Information Center) which will display the Coolant Temp. the computer sees.
Did you have the ignition in run when you did your test? If it was, that indicates the gage is bad or a wiring problem. (not likely)
The sensor you're talking about can only be read by using a scan tool, or a aftermarket software program.
I think you can also place the CCM (Central Computer Module) in diagnostic mode and push some buttons on the DIC. (Driver Information Center) which will display the Coolant Temp. the computer sees.
Did you have the ignition in run when you did your test? If it was, that indicates the gage is bad or a wiring problem. (not likely)
Last edited by Hooked on Vettes; Mar 14, 2005 at 12:07 PM.
